/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:53:29,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:53:29,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:53:29,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 03:53:29,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 03:53:29,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 03:53:29,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 03:53:29,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 03:53:29,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 03:53:29,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 03:53:29,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 03:53:29,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 03:53:29,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 03:53:29,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 03:53:29,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 03:53:29,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 03:53:29,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 03:53:29,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 03:53:29,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 03:53:29,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 03:53:29,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 03:53:29,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 03:53:29,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 03:53:29,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 03:53:29,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 03:53:29,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 03:53:29,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 03:53:29,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 03:53:29,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 03:53:29,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 03:53:29,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 03:53:29,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 03:53:29,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 03:53:29,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 03:53:29,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 03:53:29,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 03:53:29,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 03:53:29,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 03:53:29,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 03:53:29,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 03:53:29,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 03:53:29,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:53:29,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:53:29,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:53:29,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:53:29,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:53:29,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:53:29,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:53:29,610 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:53:29,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:53:29,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:53:29,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:53:29,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:53:29,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:53:29,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:53:29,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:53:29,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:53:29,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:53:29,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:53:29,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:53:29,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:53:29,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:53:29,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:53:29,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:53:29,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:53:29,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:53:29,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:53:29,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:53:29,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:53:29,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:53:29,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:53:29,614 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:53:29,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:53:29,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:53:29,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:53:29,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:53:29,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:53:29,917 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:53:29,918 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:53:29,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-06-05 03:53:29,919 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-06-05 03:53:29,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:53:29,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:53:29,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:53:29,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:53:29,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:53:29,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:53:29,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:53:29,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:53:29,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:53:29,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:29,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:30,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:30,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/1) ... [2021-06-05 03:53:30,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:53:30,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:53:30,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:53:30,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:53:30,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (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 03:53:30,078 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:53:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:53:30,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:53:30,079 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:53:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:53:30,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:53:30,080 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:53:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:53:30,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:53:30,080 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 03:53:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 03:53:30,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 03:53:30,082 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 03:53:30,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:53:30,259 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:53:30,261 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:53:30 BoogieIcfgContainer [2021-06-05 03:53:30,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:53:30,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:53:30,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:53:30,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:53:30,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:29" (1/2) ... [2021-06-05 03:53:30,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab48195 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:53:30, skipping insertion in model container [2021-06-05 03:53:30,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:53:30" (2/2) ... [2021-06-05 03:53:30,267 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-06-05 03:53:30,272 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:53:30,272 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:53:30,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:53:30,273 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:53:30,323 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 03:53:30,358 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:53:30,391 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:53:30,391 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:53:30,391 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:53:30,391 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:53:30,392 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:53:30,392 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:53:30,392 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:53:30,392 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:53:30,400 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 03:53:30,426 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 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 03:53:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 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 03:53:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:30,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:30,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,442 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-06-05 03:53:30,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247558025] [2021-06-05 03:53:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:30,683 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 03:53:30,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247558025] [2021-06-05 03:53:30,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247558025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:30,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:30,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:53:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300482974] [2021-06-05 03:53:30,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:53:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:53:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:53:30,702 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:30,744 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 03:53:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:53:30,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:30,759 INFO L225 Difference]: With dead ends: 214 [2021-06-05 03:53:30,759 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 03:53:30,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:53:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 03:53:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 03:53:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 03:53:30,829 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 03:53:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:30,830 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 03:53:30,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 03:53:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:30,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:30,832 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 03:53:30,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:53:30,832 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-06-05 03:53:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324809835] [2021-06-05 03:53:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:30,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324809835] [2021-06-05 03:53:30,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324809835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579409572] [2021-06-05 03:53:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579409572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:31,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-06-05 03:53:31,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166338431] [2021-06-05 03:53:31,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:53:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:53:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:53:31,197 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:31,443 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-06-05 03:53:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,447 INFO L225 Difference]: With dead ends: 468 [2021-06-05 03:53:31,447 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 03:53:31,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 03:53:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-06-05 03:53:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-06-05 03:53:31,461 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-06-05 03:53:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:31,461 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-06-05 03:53:31,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-06-05 03:53:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:31,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:31,463 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 03:53:31,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 03:53:31,677 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 03:53:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741056917] [2021-06-05 03:53:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,722 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 03:53:31,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741056917] [2021-06-05 03:53:31,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741056917] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:31,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:31,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:53:31,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874911109] [2021-06-05 03:53:31,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:53:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:53:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:53:31,730 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:31,776 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-06-05 03:53:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:53:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,784 INFO L225 Difference]: With dead ends: 283 [2021-06-05 03:53:31,784 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 03:53:31,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 03:53:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-06-05 03:53:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-06-05 03:53:31,803 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-06-05 03:53:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:31,804 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-06-05 03:53:31,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-06-05 03:53:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:31,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:31,809 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 03:53:31,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:53:31,809 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-06-05 03:53:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:31,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797453037] [2021-06-05 03:53:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,874 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 03:53:31,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797453037] [2021-06-05 03:53:31,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797453037] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:31,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:31,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:31,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477599811] [2021-06-05 03:53:31,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:31,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:31,877 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:31,928 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-06-05 03:53:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:53:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,930 INFO L225 Difference]: With dead ends: 339 [2021-06-05 03:53:31,930 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 03:53:31,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:53:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 03:53:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-06-05 03:53:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-06-05 03:53:31,940 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-06-05 03:53:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:31,940 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-06-05 03:53:31,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-06-05 03:53:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:31,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:31,943 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 03:53:31,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:53:31,943 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-06-05 03:53:31,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:31,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267857129] [2021-06-05 03:53:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,999 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 03:53:31,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267857129] [2021-06-05 03:53:32,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267857129] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:32,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:32,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387227460] [2021-06-05 03:53:32,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:32,003 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:32,109 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-06-05 03:53:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:53:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:32,111 INFO L225 Difference]: With dead ends: 253 [2021-06-05 03:53:32,111 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 03:53:32,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 03:53:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-06-05 03:53:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-06-05 03:53:32,120 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-06-05 03:53:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:32,120 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-06-05 03:53:32,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-06-05 03:53:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:32,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:32,121 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 03:53:32,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:53:32,122 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-06-05 03:53:32,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:32,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520669584] [2021-06-05 03:53:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:32,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520669584] [2021-06-05 03:53:32,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520669584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121070360] [2021-06-05 03:53:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121070360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:32,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 03:53:32,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368605174] [2021-06-05 03:53:32,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:53:32,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:53:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:53:32,355 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:32,695 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-06-05 03:53:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:32,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:32,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:32,701 INFO L225 Difference]: With dead ends: 429 [2021-06-05 03:53:32,701 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 03:53:32,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 03:53:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-06-05 03:53:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-06-05 03:53:32,712 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-06-05 03:53:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:32,713 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-06-05 03:53:32,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-06-05 03:53:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:32,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:32,714 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 03:53:32,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:32,929 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-06-05 03:53:32,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:32,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312441534] [2021-06-05 03:53:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:32,976 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 03:53:32,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312441534] [2021-06-05 03:53:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312441534] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:32,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:32,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828562284] [2021-06-05 03:53:32,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:32,978 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,042 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-06-05 03:53:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:53:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,044 INFO L225 Difference]: With dead ends: 300 [2021-06-05 03:53:33,044 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 03:53:33,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:53:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 03:53:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-06-05 03:53:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-06-05 03:53:33,050 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-06-05 03:53:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,051 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-06-05 03:53:33,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-06-05 03:53:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,051 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 03:53:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:53:33,052 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-06-05 03:53:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931749436] [2021-06-05 03:53:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,101 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 03:53:33,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931749436] [2021-06-05 03:53:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931749436] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:33,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:33,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:33,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916074434] [2021-06-05 03:53:33,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:33,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:33,105 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,216 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-06-05 03:53:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,219 INFO L225 Difference]: With dead ends: 305 [2021-06-05 03:53:33,219 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 03:53:33,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 03:53:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-06-05 03:53:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-06-05 03:53:33,225 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-06-05 03:53:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,225 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-06-05 03:53:33,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-06-05 03:53:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,226 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 03:53:33,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:53:33,227 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-06-05 03:53:33,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710300428] [2021-06-05 03:53:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,252 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 03:53:33,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710300428] [2021-06-05 03:53:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710300428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:33,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:33,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:33,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545168456] [2021-06-05 03:53:33,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:33,254 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,360 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-06-05 03:53:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,362 INFO L225 Difference]: With dead ends: 285 [2021-06-05 03:53:33,363 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 03:53:33,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 03:53:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-06-05 03:53:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-06-05 03:53:33,369 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-06-05 03:53:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,369 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-06-05 03:53:33,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-06-05 03:53:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,370 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 03:53:33,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:53:33,370 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-06-05 03:53:33,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441284988] [2021-06-05 03:53:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,398 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 03:53:33,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441284988] [2021-06-05 03:53:33,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441284988] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:33,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:33,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:53:33,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379376647] [2021-06-05 03:53:33,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:53:33,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:53:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:53:33,400 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,477 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-06-05 03:53:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:53:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,479 INFO L225 Difference]: With dead ends: 251 [2021-06-05 03:53:33,479 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 03:53:33,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:53:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 03:53:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-06-05 03:53:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-06-05 03:53:33,485 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-06-05 03:53:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,485 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-06-05 03:53:33,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 03:53:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-06-05 03:53:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,486 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 03:53:33,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:53:33,486 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-06-05 03:53:33,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209097493] [2021-06-05 03:53:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:33,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209097493] [2021-06-05 03:53:33,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209097493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941420999] [2021-06-05 03:53:33,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:33,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941420999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:33,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756387594] [2021-06-05 03:53:33,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:33,693 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,914 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-06-05 03:53:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:53:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,916 INFO L225 Difference]: With dead ends: 357 [2021-06-05 03:53:33,916 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 03:53:33,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 03:53:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-06-05 03:53:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-06-05 03:53:33,923 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-06-05 03:53:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,923 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-06-05 03:53:33,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-06-05 03:53:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,924 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 03:53:34,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 03:53:34,147 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-06-05 03:53:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:34,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192707080] [2021-06-05 03:53:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:34,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192707080] [2021-06-05 03:53:34,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192707080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776720493] [2021-06-05 03:53:34,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:53:34,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:34,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776720493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:34,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54044191] [2021-06-05 03:53:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:34,301 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:34,504 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-06-05 03:53:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:34,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:34,506 INFO L225 Difference]: With dead ends: 311 [2021-06-05 03:53:34,506 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 03:53:34,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 03:53:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-06-05 03:53:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-06-05 03:53:34,511 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-06-05 03:53:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:34,511 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-06-05 03:53:34,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-06-05 03:53:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:53:34,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:34,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:34,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,736 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-06-05 03:53:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:34,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653448592] [2021-06-05 03:53:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653448592] [2021-06-05 03:53:34,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653448592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508233323] [2021-06-05 03:53:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:53:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508233323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:34,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:34,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996993563] [2021-06-05 03:53:34,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:34,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:34,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:34,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:34,942 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:35,047 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-06-05 03:53:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:53:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:53:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:35,050 INFO L225 Difference]: With dead ends: 554 [2021-06-05 03:53:35,050 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 03:53:35,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 03:53:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-06-05 03:53:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-06-05 03:53:35,060 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-06-05 03:53:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:35,060 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-06-05 03:53:35,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-06-05 03:53:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:53:35,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:35,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 03:53:35,277 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-06-05 03:53:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:35,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556192317] [2021-06-05 03:53:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:35,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556192317] [2021-06-05 03:53:35,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556192317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679211986] [2021-06-05 03:53:35,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:35,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:35,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:53:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679211986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:35,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:35,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788841613] [2021-06-05 03:53:35,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:35,457 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:35,546 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-06-05 03:53:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:53:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:53:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:35,551 INFO L225 Difference]: With dead ends: 707 [2021-06-05 03:53:35,551 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 03:53:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 03:53:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-06-05 03:53:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-06-05 03:53:35,565 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-06-05 03:53:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:35,565 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-06-05 03:53:35,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-06-05 03:53:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:35,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:35,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:35,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,777 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-06-05 03:53:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921126292] [2021-06-05 03:53:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921126292] [2021-06-05 03:53:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921126292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697139501] [2021-06-05 03:53:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:35,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697139501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:35,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:53:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513597676] [2021-06-05 03:53:35,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:35,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:35,950 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:36,239 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-06-05 03:53:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:36,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:36,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:36,245 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 03:53:36,245 INFO L226 Difference]: Without dead ends: 1001 [2021-06-05 03:53:36,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-06-05 03:53:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-06-05 03:53:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-06-05 03:53:36,265 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-06-05 03:53:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:36,265 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-06-05 03:53:36,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-06-05 03:53:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:36,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:36,267 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 03:53:36,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 03:53:36,481 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 03:53:36,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:36,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421777358] [2021-06-05 03:53:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:36,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:36,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421777358] [2021-06-05 03:53:36,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421777358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954796834] [2021-06-05 03:53:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:53:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:36,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954796834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:36,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:53:36,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613859062] [2021-06-05 03:53:36,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:36,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:36,690 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:37,152 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-06-05 03:53:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:37,159 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 03:53:37,159 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 03:53:37,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 03:53:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-06-05 03:53:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-06-05 03:53:37,180 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-06-05 03:53:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,181 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-06-05 03:53:37,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-06-05 03:53:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:37,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:37,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 03:53:37,397 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-06-05 03:53:37,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:37,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294769850] [2021-06-05 03:53:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294769850] [2021-06-05 03:53:37,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294769850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395098659] [2021-06-05 03:53:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:37,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395098659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:37,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466012093] [2021-06-05 03:53:37,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:37,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:37,619 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:38,035 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-06-05 03:53:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:38,040 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 03:53:38,040 INFO L226 Difference]: Without dead ends: 977 [2021-06-05 03:53:38,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-06-05 03:53:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-06-05 03:53:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-06-05 03:53:38,059 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-06-05 03:53:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:38,059 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-06-05 03:53:38,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-06-05 03:53:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:38,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:38,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:53:38,275 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-06-05 03:53:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875876788] [2021-06-05 03:53:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875876788] [2021-06-05 03:53:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875876788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74239061] [2021-06-05 03:53:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74239061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:38,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289192734] [2021-06-05 03:53:38,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:38,475 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:39,449 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-06-05 03:53:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:53:39,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:39,459 INFO L225 Difference]: With dead ends: 1926 [2021-06-05 03:53:39,459 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 03:53:39,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:53:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 03:53:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-06-05 03:53:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-06-05 03:53:39,492 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-06-05 03:53:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:39,493 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-06-05 03:53:39,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-06-05 03:53:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:39,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:39,495 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 03:53:39,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 03:53:39,705 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-06-05 03:53:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:39,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643126032] [2021-06-05 03:53:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:39,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643126032] [2021-06-05 03:53:39,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643126032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134470539] [2021-06-05 03:53:39,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:39,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:39,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:53:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134470539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:39,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:53:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73939958] [2021-06-05 03:53:39,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:39,889 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:40,261 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-06-05 03:53:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:53:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:40,273 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 03:53:40,274 INFO L226 Difference]: Without dead ends: 2518 [2021-06-05 03:53:40,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:53:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-06-05 03:53:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-06-05 03:53:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-06-05 03:53:40,314 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-06-05 03:53:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:40,315 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-06-05 03:53:40,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-06-05 03:53:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:40,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:40,317 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 03:53:40,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:40,540 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:40,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-06-05 03:53:40,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:40,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250240045] [2021-06-05 03:53:40,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:40,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250240045] [2021-06-05 03:53:40,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250240045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785146080] [2021-06-05 03:53:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:40,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:53:40,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:53:40,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785146080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:40,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:53:40,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868881419] [2021-06-05 03:53:40,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:40,721 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:41,085 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-06-05 03:53:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:53:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:41,098 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 03:53:41,098 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 03:53:41,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 03:53:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-06-05 03:53:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-06-05 03:53:41,138 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-06-05 03:53:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:41,139 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-06-05 03:53:41,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-06-05 03:53:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:41,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:41,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:41,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:41,363 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-06-05 03:53:41,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:41,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025692044] [2021-06-05 03:53:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:41,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025692044] [2021-06-05 03:53:41,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025692044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582394579] [2021-06-05 03:53:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:41,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:41,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:41,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582394579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:41,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706270582] [2021-06-05 03:53:41,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:41,555 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:42,236 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-06-05 03:53:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:53:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:42,246 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 03:53:42,246 INFO L226 Difference]: Without dead ends: 1972 [2021-06-05 03:53:42,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:53:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-06-05 03:53:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-06-05 03:53:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-06-05 03:53:42,279 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-06-05 03:53:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:42,280 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-06-05 03:53:42,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-06-05 03:53:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:42,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:42,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:42,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 03:53:42,497 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-06-05 03:53:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:42,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286680856] [2021-06-05 03:53:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286680856] [2021-06-05 03:53:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286680856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829651693] [2021-06-05 03:53:42,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829651693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:42,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040513906] [2021-06-05 03:53:42,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:42,672 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:43,095 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-06-05 03:53:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:53:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:43,099 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 03:53:43,099 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 03:53:43,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:53:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 03:53:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-06-05 03:53:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-06-05 03:53:43,126 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-06-05 03:53:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-06-05 03:53:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-06-05 03:53:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:43,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:43,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:43,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,351 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-06-05 03:53:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:43,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888107235] [2021-06-05 03:53:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888107235] [2021-06-05 03:53:43,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888107235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954262522] [2021-06-05 03:53:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954262522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:43,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711112783] [2021-06-05 03:53:43,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:43,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:43,521 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:44,083 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-06-05 03:53:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:53:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:44,088 INFO L225 Difference]: With dead ends: 1755 [2021-06-05 03:53:44,088 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 03:53:44,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:53:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 03:53:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-06-05 03:53:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-06-05 03:53:44,118 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-06-05 03:53:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:44,118 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-06-05 03:53:44,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-06-05 03:53:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:44,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:44,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:44,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 03:53:44,343 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-06-05 03:53:44,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:44,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712164048] [2021-06-05 03:53:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:44,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712164048] [2021-06-05 03:53:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712164048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922168525] [2021-06-05 03:53:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:44,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922168525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:44,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755957519] [2021-06-05 03:53:44,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:44,499 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,232 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-06-05 03:53:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:53:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,235 INFO L225 Difference]: With dead ends: 1827 [2021-06-05 03:53:45,235 INFO L226 Difference]: Without dead ends: 1827 [2021-06-05 03:53:45,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:53:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-06-05 03:53:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-06-05 03:53:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-06-05 03:53:45,268 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-06-05 03:53:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,268 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-06-05 03:53:45,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-06-05 03:53:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:45,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:45,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:45,494 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:45,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-06-05 03:53:45,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:45,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121416097] [2021-06-05 03:53:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121416097] [2021-06-05 03:53:45,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121416097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271132416] [2021-06-05 03:53:45,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:45,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271132416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:45,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 03:53:45,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696942926] [2021-06-05 03:53:45,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:45,607 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,806 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-06-05 03:53:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,810 INFO L225 Difference]: With dead ends: 1785 [2021-06-05 03:53:45,810 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 03:53:45,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 03:53:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-06-05 03:53:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-06-05 03:53:45,839 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-06-05 03:53:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,840 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-06-05 03:53:45,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-06-05 03:53:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:45,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 03:53:46,064 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-06-05 03:53:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:46,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557281363] [2021-06-05 03:53:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557281363] [2021-06-05 03:53:46,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557281363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257220553] [2021-06-05 03:53:46,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:46,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257220553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:46,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:46,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983803305] [2021-06-05 03:53:46,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:46,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:46,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:46,290 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:47,101 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-06-05 03:53:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:53:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:47,106 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 03:53:47,107 INFO L226 Difference]: Without dead ends: 2577 [2021-06-05 03:53:47,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:53:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-06-05 03:53:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-06-05 03:53:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-06-05 03:53:47,144 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-06-05 03:53:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:47,145 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-06-05 03:53:47,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-06-05 03:53:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:47,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:47,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:47,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 03:53:47,369 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-06-05 03:53:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:47,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770472907] [2021-06-05 03:53:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:47,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770472907] [2021-06-05 03:53:47,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770472907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777786262] [2021-06-05 03:53:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:47,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:53:47,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:47,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777786262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:47,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324211407] [2021-06-05 03:53:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:47,548 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:48,115 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-06-05 03:53:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:53:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:48,121 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 03:53:48,121 INFO L226 Difference]: Without dead ends: 2249 [2021-06-05 03:53:48,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:53:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-05 03:53:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-06-05 03:53:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-06-05 03:53:48,156 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-06-05 03:53:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:48,156 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-06-05 03:53:48,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-06-05 03:53:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:48,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:48,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:48,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:53:48,373 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-06-05 03:53:48,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:48,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800983865] [2021-06-05 03:53:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800983865] [2021-06-05 03:53:48,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800983865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098096602] [2021-06-05 03:53:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098096602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:48,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:48,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969658633] [2021-06-05 03:53:48,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:48,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:48,556 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:49,448 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-06-05 03:53:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:53:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:49,458 INFO L225 Difference]: With dead ends: 2820 [2021-06-05 03:53:49,459 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 03:53:49,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:53:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 03:53:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-06-05 03:53:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-06-05 03:53:49,495 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-06-05 03:53:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:49,496 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-06-05 03:53:49,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-06-05 03:53:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:49,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:49,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:49,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 03:53:49,713 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-06-05 03:53:49,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:49,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800559672] [2021-06-05 03:53:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:49,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800559672] [2021-06-05 03:53:49,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800559672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345962367] [2021-06-05 03:53:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:49,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:49,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:49,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345962367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:49,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:49,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141183011] [2021-06-05 03:53:49,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:49,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:49,890 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:50,644 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-06-05 03:53:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:53:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:50,649 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 03:53:50,649 INFO L226 Difference]: Without dead ends: 2539 [2021-06-05 03:53:50,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-05 03:53:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-06-05 03:53:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-06-05 03:53:50,683 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-06-05 03:53:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:50,683 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-06-05 03:53:50,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-06-05 03:53:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:50,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:50,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:50,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 03:53:50,907 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-06-05 03:53:50,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:50,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515425355] [2021-06-05 03:53:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:50,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:50,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515425355] [2021-06-05 03:53:50,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515425355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:50,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612862839] [2021-06-05 03:53:50,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:50,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:53:50,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612862839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:51,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106921638] [2021-06-05 03:53:51,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:51,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:51,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:51,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:51,069 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:51,598 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-06-05 03:53:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:53:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:51,601 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 03:53:51,601 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 03:53:51,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:53:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 03:53:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-06-05 03:53:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-06-05 03:53:51,631 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-06-05 03:53:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:51,631 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-06-05 03:53:51,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-06-05 03:53:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:51,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:51,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:51,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:51,849 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-06-05 03:53:51,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:51,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291631797] [2021-06-05 03:53:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291631797] [2021-06-05 03:53:51,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291631797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599077677] [2021-06-05 03:53:51,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:51,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599077677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513861386] [2021-06-05 03:53:51,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:52,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:52,000 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:52,597 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-06-05 03:53:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:53:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:52,600 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 03:53:52,600 INFO L226 Difference]: Without dead ends: 2278 [2021-06-05 03:53:52,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:53:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-06-05 03:53:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-06-05 03:53:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-06-05 03:53:52,626 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-06-05 03:53:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:52,626 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-06-05 03:53:52,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-06-05 03:53:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:52,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:52,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:52,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 03:53:52,845 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-06-05 03:53:52,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:52,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262500279] [2021-06-05 03:53:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262500279] [2021-06-05 03:53:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262500279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215180317] [2021-06-05 03:53:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:52,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:52,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:52,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215180317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:52,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:52,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444034582] [2021-06-05 03:53:52,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:52,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:52,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:52,985 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:53,125 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-06-05 03:53:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:53,129 INFO L225 Difference]: With dead ends: 2607 [2021-06-05 03:53:53,129 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 03:53:53,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 03:53:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-06-05 03:53:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-06-05 03:53:53,159 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-06-05 03:53:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:53,159 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-06-05 03:53:53,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-06-05 03:53:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:53,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:53,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:53,364 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-06-05 03:53:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878761882] [2021-06-05 03:53:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878761882] [2021-06-05 03:53:53,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878761882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572830637] [2021-06-05 03:53:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:53,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:53,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:53,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572830637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:53,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 03:53:53,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701625103] [2021-06-05 03:53:53,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:53:53,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:53:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:53:53,490 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:53,635 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-06-05 03:53:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:53:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:53,639 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 03:53:53,639 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 03:53:53,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 03:53:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-06-05 03:53:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-06-05 03:53:53,676 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-06-05 03:53:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-06-05 03:53:53,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-06-05 03:53:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:53,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:53,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 03:53:53,893 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-06-05 03:53:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925340716] [2021-06-05 03:53:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:53,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925340716] [2021-06-05 03:53:53,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925340716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189227281] [2021-06-05 03:53:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189227281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 03:53:54,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077861763] [2021-06-05 03:53:54,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:54,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:54,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:54,018 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,168 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-06-05 03:53:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,172 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 03:53:54,172 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 03:53:54,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 03:53:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-06-05 03:53:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-06-05 03:53:54,207 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-06-05 03:53:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-06-05 03:53:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-06-05 03:53:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:54,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:54,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 03:53:54,427 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:54,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-06-05 03:53:54,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:54,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172721095] [2021-06-05 03:53:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172721095] [2021-06-05 03:53:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172721095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641666098] [2021-06-05 03:53:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641666098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:54,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941283527] [2021-06-05 03:53:54,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:54,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:54,575 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,927 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-06-05 03:53:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,930 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 03:53:54,930 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 03:53:54,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 03:53:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-06-05 03:53:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-06-05 03:53:54,957 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-06-05 03:53:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,958 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-06-05 03:53:54,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-06-05 03:53:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:54,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:55,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 03:53:55,183 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-06-05 03:53:55,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:55,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778071743] [2021-06-05 03:53:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:55,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778071743] [2021-06-05 03:53:55,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778071743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944430100] [2021-06-05 03:53:55,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:55,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:55,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944430100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:55,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 03:53:55,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601905488] [2021-06-05 03:53:55,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:53:55,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:53:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:53:55,300 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:55,404 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-06-05 03:53:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:55,408 INFO L225 Difference]: With dead ends: 2649 [2021-06-05 03:53:55,408 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 03:53:55,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 03:53:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-06-05 03:53:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-06-05 03:53:55,448 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-06-05 03:53:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:55,448 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-06-05 03:53:55,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-06-05 03:53:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:55,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:55,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:55,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 03:53:55,672 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-06-05 03:53:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:55,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212288416] [2021-06-05 03:53:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212288416] [2021-06-05 03:53:55,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212288416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447024761] [2021-06-05 03:53:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:55,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447024761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:55,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:55,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135139618] [2021-06-05 03:53:55,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:55,835 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:56,266 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-06-05 03:53:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:53:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:56,271 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 03:53:56,272 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 03:53:56,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:53:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 03:53:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-06-05 03:53:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-06-05 03:53:56,324 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-06-05 03:53:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:56,324 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-06-05 03:53:56,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-06-05 03:53:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:56,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:56,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:56,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 03:53:56,552 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-06-05 03:53:56,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:56,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676357851] [2021-06-05 03:53:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676357851] [2021-06-05 03:53:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676357851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684421811] [2021-06-05 03:53:56,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:56,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684421811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:56,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:53:56,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615193049] [2021-06-05 03:53:56,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:56,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:56,666 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:56,794 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-06-05 03:53:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:56,799 INFO L225 Difference]: With dead ends: 3232 [2021-06-05 03:53:56,799 INFO L226 Difference]: Without dead ends: 3232 [2021-06-05 03:53:56,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-05 03:53:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-06-05 03:53:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-06-05 03:53:56,841 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-06-05 03:53:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:56,841 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-06-05 03:53:56,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-06-05 03:53:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:56,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:56,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:57,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,069 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-06-05 03:53:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781354019] [2021-06-05 03:53:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781354019] [2021-06-05 03:53:57,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781354019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141249215] [2021-06-05 03:53:57,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:57,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141249215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:57,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371506966] [2021-06-05 03:53:57,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:57,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:57,228 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:57,610 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-06-05 03:53:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:53:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:57,613 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 03:53:57,613 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 03:53:57,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:53:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 03:53:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-06-05 03:53:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-06-05 03:53:57,648 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-06-05 03:53:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:57,648 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-06-05 03:53:57,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-06-05 03:53:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:57,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:57,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:57,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:53:57,869 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:57,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-06-05 03:53:57,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:57,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900546529] [2021-06-05 03:53:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900546529] [2021-06-05 03:53:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900546529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207627782] [2021-06-05 03:53:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:53:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207627782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:53:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080333865] [2021-06-05 03:53:57,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:53:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:53:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:57,990 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,163 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-06-05 03:53:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,167 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 03:53:58,167 INFO L226 Difference]: Without dead ends: 3168 [2021-06-05 03:53:58,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-06-05 03:53:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-06-05 03:53:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-06-05 03:53:58,203 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-06-05 03:53:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,203 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-06-05 03:53:58,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-06-05 03:53:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:58,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:58,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:53:58,428 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-06-05 03:53:58,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:58,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487305335] [2021-06-05 03:53:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:58,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487305335] [2021-06-05 03:53:58,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487305335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977019286] [2021-06-05 03:53:58,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:58,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977019286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:58,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:53:58,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334735632] [2021-06-05 03:53:58,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:58,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:58,612 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,921 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-06-05 03:53:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,924 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 03:53:58,924 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 03:53:58,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 03:53:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-06-05 03:53:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-06-05 03:53:58,956 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-06-05 03:53:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,956 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-06-05 03:53:58,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-06-05 03:53:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:58,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,960 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 03:53:59,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,181 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-06-05 03:53:59,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:59,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378855257] [2021-06-05 03:53:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378855257] [2021-06-05 03:53:59,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378855257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797521712] [2021-06-05 03:53:59,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:59,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:53:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797521712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:59,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:53:59,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918548525] [2021-06-05 03:53:59,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:59,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:59,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:59,359 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:59,671 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-06-05 03:53:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:59,676 INFO L225 Difference]: With dead ends: 2917 [2021-06-05 03:53:59,676 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 03:53:59,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 03:53:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-06-05 03:53:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-06-05 03:53:59,716 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-06-05 03:53:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:59,717 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-06-05 03:53:59,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-06-05 03:53:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:59,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:59,721 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 03:53:59,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 03:53:59,939 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-06-05 03:53:59,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:59,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367133560] [2021-06-05 03:53:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367133560] [2021-06-05 03:53:59,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367133560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476032822] [2021-06-05 03:53:59,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476032822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:00,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:54:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116220324] [2021-06-05 03:54:00,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:00,118 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:00,551 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-06-05 03:54:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:00,558 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 03:54:00,558 INFO L226 Difference]: Without dead ends: 3352 [2021-06-05 03:54:00,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-06-05 03:54:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-06-05 03:54:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-06-05 03:54:00,606 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-06-05 03:54:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:00,606 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-06-05 03:54:00,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-06-05 03:54:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:00,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:00,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:00,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,825 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-06-05 03:54:00,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:00,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701412114] [2021-06-05 03:54:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701412114] [2021-06-05 03:54:00,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701412114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188983594] [2021-06-05 03:54:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188983594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:00,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:00,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411813257] [2021-06-05 03:54:00,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:00,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:00,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:00,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:00,983 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:01,186 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-06-05 03:54:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:01,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:01,189 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 03:54:01,189 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 03:54:01,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 03:54:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-06-05 03:54:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-06-05 03:54:01,242 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-06-05 03:54:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:01,243 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-06-05 03:54:01,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-06-05 03:54:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:01,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:01,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:01,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 03:54:01,446 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-06-05 03:54:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:01,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235915231] [2021-06-05 03:54:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:01,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:01,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235915231] [2021-06-05 03:54:01,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235915231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985958424] [2021-06-05 03:54:01,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:01,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:01,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:01,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:01,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:01,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985958424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:01,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:01,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204051843] [2021-06-05 03:54:01,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:01,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:01,628 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:01,934 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-06-05 03:54:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:01,937 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 03:54:01,937 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 03:54:01,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 03:54:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-06-05 03:54:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-06-05 03:54:01,965 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-06-05 03:54:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:01,965 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-06-05 03:54:01,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-06-05 03:54:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:01,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:01,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:02,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 03:54:02,169 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-06-05 03:54:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:02,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493980024] [2021-06-05 03:54:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493980024] [2021-06-05 03:54:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493980024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373062466] [2021-06-05 03:54:02,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:02,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373062466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:02,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351963128] [2021-06-05 03:54:02,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:02,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:02,330 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:02,592 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-06-05 03:54:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:02,595 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 03:54:02,595 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 03:54:02,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 03:54:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-06-05 03:54:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-06-05 03:54:02,625 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-06-05 03:54:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:02,625 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-06-05 03:54:02,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-06-05 03:54:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:02,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:02,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:02,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 03:54:02,828 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-06-05 03:54:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:02,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126488187] [2021-06-05 03:54:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126488187] [2021-06-05 03:54:02,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126488187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548536963] [2021-06-05 03:54:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:02,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548536963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:03,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:03,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085077531] [2021-06-05 03:54:03,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:03,010 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:03,241 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-06-05 03:54:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:03,244 INFO L225 Difference]: With dead ends: 2267 [2021-06-05 03:54:03,244 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 03:54:03,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 03:54:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-06-05 03:54:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-06-05 03:54:03,281 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-06-05 03:54:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,282 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-06-05 03:54:03,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-06-05 03:54:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:03,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,286 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 03:54:03,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 03:54:03,501 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-06-05 03:54:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:03,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111186900] [2021-06-05 03:54:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:03,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111186900] [2021-06-05 03:54:03,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111186900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079758734] [2021-06-05 03:54:03,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:03,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079758734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:03,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:54:03,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117749713] [2021-06-05 03:54:03,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:54:03,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:54:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:54:03,672 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:03,899 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-06-05 03:54:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:03,904 INFO L225 Difference]: With dead ends: 3127 [2021-06-05 03:54:03,904 INFO L226 Difference]: Without dead ends: 3117 [2021-06-05 03:54:03,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-06-05 03:54:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-06-05 03:54:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-06-05 03:54:03,936 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-06-05 03:54:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,936 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-06-05 03:54:03,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-06-05 03:54:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:03,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:04,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,140 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-06-05 03:54:04,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:04,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290938043] [2021-06-05 03:54:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290938043] [2021-06-05 03:54:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290938043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327730026] [2021-06-05 03:54:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:54:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327730026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:04,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:04,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692668411] [2021-06-05 03:54:04,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:04,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:04,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:04,295 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:04,629 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-06-05 03:54:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:04,633 INFO L225 Difference]: With dead ends: 2611 [2021-06-05 03:54:04,633 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 03:54:04,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 03:54:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-06-05 03:54:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-06-05 03:54:04,663 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-06-05 03:54:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:04,663 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-06-05 03:54:04,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-06-05 03:54:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:04,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:04,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:04,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 03:54:04,867 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-06-05 03:54:04,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:04,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700192890] [2021-06-05 03:54:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700192890] [2021-06-05 03:54:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700192890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693625106] [2021-06-05 03:54:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693625106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:05,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223017798] [2021-06-05 03:54:05,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:05,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:05,059 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:05,403 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-06-05 03:54:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:54:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:05,407 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 03:54:05,407 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 03:54:05,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 03:54:05,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-06-05 03:54:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-06-05 03:54:05,442 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-06-05 03:54:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:05,442 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-06-05 03:54:05,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-06-05 03:54:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:05,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:05,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 03:54:05,669 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-06-05 03:54:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403221741] [2021-06-05 03:54:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:05,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403221741] [2021-06-05 03:54:05,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403221741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774969671] [2021-06-05 03:54:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:05,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774969671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:05,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358095342] [2021-06-05 03:54:05,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:05,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:05,823 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:06,360 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-06-05 03:54:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:54:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:06,366 INFO L225 Difference]: With dead ends: 3206 [2021-06-05 03:54:06,366 INFO L226 Difference]: Without dead ends: 3185 [2021-06-05 03:54:06,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:54:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-06-05 03:54:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-06-05 03:54:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-06-05 03:54:06,407 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-06-05 03:54:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:06,407 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-06-05 03:54:06,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-06-05 03:54:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:06,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:06,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,612 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-06-05 03:54:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778920334] [2021-06-05 03:54:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778920334] [2021-06-05 03:54:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778920334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876144183] [2021-06-05 03:54:06,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:54:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876144183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:06,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:06,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104127469] [2021-06-05 03:54:06,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:06,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:06,801 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:07,588 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-06-05 03:54:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:54:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:07,593 INFO L225 Difference]: With dead ends: 3541 [2021-06-05 03:54:07,593 INFO L226 Difference]: Without dead ends: 3541 [2021-06-05 03:54:07,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:54:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-06-05 03:54:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-06-05 03:54:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-06-05 03:54:07,629 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-06-05 03:54:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:07,629 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-06-05 03:54:07,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-06-05 03:54:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:07,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:07,632 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 03:54:07,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 03:54:07,833 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-06-05 03:54:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904600786] [2021-06-05 03:54:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904600786] [2021-06-05 03:54:07,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904600786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410439574] [2021-06-05 03:54:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410439574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:07,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:54:07,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972833276] [2021-06-05 03:54:07,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:07,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:07,983 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:08,626 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-06-05 03:54:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:54:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:08,631 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 03:54:08,632 INFO L226 Difference]: Without dead ends: 3900 [2021-06-05 03:54:08,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:54:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-06-05 03:54:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-06-05 03:54:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-06-05 03:54:08,680 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-06-05 03:54:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:08,680 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-06-05 03:54:08,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-06-05 03:54:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:08,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:08,684 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 03:54:08,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:08,900 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-06-05 03:54:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:08,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644256772] [2021-06-05 03:54:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:08,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:08,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644256772] [2021-06-05 03:54:08,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644256772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149934783] [2021-06-05 03:54:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149934783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:09,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:54:09,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693527356] [2021-06-05 03:54:09,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:09,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:09,045 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:09,644 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-06-05 03:54:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:54:09,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:09,649 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 03:54:09,649 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 03:54:09,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:54:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 03:54:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-06-05 03:54:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-06-05 03:54:09,683 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-06-05 03:54:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:09,683 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-06-05 03:54:09,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-06-05 03:54:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:09,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:09,686 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 03:54:09,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 03:54:09,889 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-06-05 03:54:09,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:09,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209584509] [2021-06-05 03:54:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:09,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209584509] [2021-06-05 03:54:09,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209584509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74240760] [2021-06-05 03:54:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:09,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:54:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74240760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:10,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:54:10,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708881726] [2021-06-05 03:54:10,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:10,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:10,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:10,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:10,047 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:10,444 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-06-05 03:54:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:10,448 INFO L225 Difference]: With dead ends: 3342 [2021-06-05 03:54:10,448 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 03:54:10,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 03:54:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-06-05 03:54:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-06-05 03:54:10,491 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-06-05 03:54:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:10,492 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-06-05 03:54:10,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-06-05 03:54:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:10,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:10,496 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 03:54:10,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:10,718 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-06-05 03:54:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:10,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548113234] [2021-06-05 03:54:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548113234] [2021-06-05 03:54:10,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548113234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514544504] [2021-06-05 03:54:10,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:10,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514544504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:10,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:54:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129269653] [2021-06-05 03:54:10,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:54:10,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:54:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:54:10,845 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:11,165 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-06-05 03:54:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:11,170 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 03:54:11,170 INFO L226 Difference]: Without dead ends: 3178 [2021-06-05 03:54:11,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:11,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-06-05 03:54:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-06-05 03:54:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-06-05 03:54:11,201 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-06-05 03:54:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:11,201 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-06-05 03:54:11,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-06-05 03:54:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:11,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:11,203 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 03:54:11,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 03:54:11,404 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-06-05 03:54:11,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096916397] [2021-06-05 03:54:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096916397] [2021-06-05 03:54:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096916397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463279437] [2021-06-05 03:54:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463279437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:11,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:54:11,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278028433] [2021-06-05 03:54:11,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:11,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:11,546 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:12,060 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-06-05 03:54:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:54:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,065 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 03:54:12,065 INFO L226 Difference]: Without dead ends: 3630 [2021-06-05 03:54:12,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:54:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-06-05 03:54:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-06-05 03:54:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-06-05 03:54:12,096 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-06-05 03:54:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:12,096 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-06-05 03:54:12,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-06-05 03:54:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:54:12,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:12,099 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 03:54:12,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 03:54:12,299 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-06-05 03:54:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:12,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110592075] [2021-06-05 03:54:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110592075] [2021-06-05 03:54:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110592075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336767479] [2021-06-05 03:54:12,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:12,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:54:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:54:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336767479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:54:12,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61537685] [2021-06-05 03:54:12,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:54:12,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:54:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:54:12,468 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:12,966 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-06-05 03:54:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:54:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:54:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,970 INFO L225 Difference]: With dead ends: 3456 [2021-06-05 03:54:12,970 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 03:54:12,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:54:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 03:54:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-06-05 03:54:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-06-05 03:54:13,000 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-06-05 03:54:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,000 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-06-05 03:54:13,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-06-05 03:54:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:13,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:13,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 03:54:13,204 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-06-05 03:54:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:13,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597566321] [2021-06-05 03:54:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597566321] [2021-06-05 03:54:13,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597566321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452773369] [2021-06-05 03:54:13,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:54:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452773369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:13,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 03:54:13,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919069040] [2021-06-05 03:54:13,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:13,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:13,474 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,651 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-06-05 03:54:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,655 INFO L225 Difference]: With dead ends: 3313 [2021-06-05 03:54:13,656 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 03:54:13,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 03:54:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-06-05 03:54:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-06-05 03:54:13,692 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-06-05 03:54:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,692 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-06-05 03:54:13,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-06-05 03:54:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:13,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:13,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 03:54:13,896 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-06-05 03:54:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:13,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52496361] [2021-06-05 03:54:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:13,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52496361] [2021-06-05 03:54:13,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52496361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100119215] [2021-06-05 03:54:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:54:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100119215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202429312] [2021-06-05 03:54:14,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:14,093 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:14,292 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-06-05 03:54:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:14,298 INFO L225 Difference]: With dead ends: 3950 [2021-06-05 03:54:14,298 INFO L226 Difference]: Without dead ends: 3891 [2021-06-05 03:54:14,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-05 03:54:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-06-05 03:54:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-06-05 03:54:14,344 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-06-05 03:54:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:14,344 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-06-05 03:54:14,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-06-05 03:54:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:14,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:14,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:14,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 03:54:14,549 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-06-05 03:54:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:14,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298418704] [2021-06-05 03:54:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:14,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298418704] [2021-06-05 03:54:14,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298418704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646684457] [2021-06-05 03:54:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:54:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646684457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:14,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:14,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134144747] [2021-06-05 03:54:14,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:14,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:14,750 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:14,900 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-06-05 03:54:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:54:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:14,906 INFO L225 Difference]: With dead ends: 3639 [2021-06-05 03:54:14,906 INFO L226 Difference]: Without dead ends: 3609 [2021-06-05 03:54:14,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-06-05 03:54:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-06-05 03:54:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-06-05 03:54:14,950 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-06-05 03:54:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:14,950 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-06-05 03:54:14,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-06-05 03:54:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:14,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:14,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:15,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 03:54:15,155 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:15,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-06-05 03:54:15,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:15,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079825909] [2021-06-05 03:54:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:15,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079825909] [2021-06-05 03:54:15,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079825909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971218966] [2021-06-05 03:54:15,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:15,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:54:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971218966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:54:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149532548] [2021-06-05 03:54:15,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:15,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:15,348 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:15,477 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-06-05 03:54:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:54:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:15,482 INFO L225 Difference]: With dead ends: 3651 [2021-06-05 03:54:15,482 INFO L226 Difference]: Without dead ends: 3621 [2021-06-05 03:54:15,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-06-05 03:54:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-06-05 03:54:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-06-05 03:54:15,527 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-06-05 03:54:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:15,527 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-06-05 03:54:15,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-06-05 03:54:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:15,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:15,532 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:15,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,733 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-06-05 03:54:15,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:15,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909213251] [2021-06-05 03:54:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909213251] [2021-06-05 03:54:15,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909213251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614451196] [2021-06-05 03:54:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614451196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:54:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262524029] [2021-06-05 03:54:15,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:15,957 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:16,407 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-06-05 03:54:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:16,416 INFO L225 Difference]: With dead ends: 5445 [2021-06-05 03:54:16,416 INFO L226 Difference]: Without dead ends: 5445 [2021-06-05 03:54:16,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-06-05 03:54:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-06-05 03:54:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-06-05 03:54:16,475 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-06-05 03:54:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,476 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-06-05 03:54:16,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-06-05 03:54:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:16,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,681 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-06-05 03:54:16,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146812399] [2021-06-05 03:54:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146812399] [2021-06-05 03:54:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146812399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108787159] [2021-06-05 03:54:16,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:16,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:54:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108787159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:16,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:54:16,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183113588] [2021-06-05 03:54:16,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:16,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:16,862 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:17,277 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-06-05 03:54:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:17,286 INFO L225 Difference]: With dead ends: 5828 [2021-06-05 03:54:17,287 INFO L226 Difference]: Without dead ends: 5828 [2021-06-05 03:54:17,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-06-05 03:54:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-06-05 03:54:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-06-05 03:54:17,380 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-06-05 03:54:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:17,380 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-06-05 03:54:17,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-06-05 03:54:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:17,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:17,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:17,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,589 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-06-05 03:54:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:17,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861062696] [2021-06-05 03:54:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:17,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861062696] [2021-06-05 03:54:17,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861062696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587225017] [2021-06-05 03:54:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:17,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587225017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:17,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661230580] [2021-06-05 03:54:17,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:17,803 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:18,360 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-06-05 03:54:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:54:18,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:18,369 INFO L225 Difference]: With dead ends: 5115 [2021-06-05 03:54:18,369 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 03:54:18,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:54:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 03:54:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-06-05 03:54:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-06-05 03:54:18,433 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-06-05 03:54:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:18,433 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-06-05 03:54:18,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-06-05 03:54:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:18,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:18,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:18,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,653 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-06-05 03:54:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:18,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062782355] [2021-06-05 03:54:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062782355] [2021-06-05 03:54:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062782355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877333118] [2021-06-05 03:54:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877333118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:18,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:18,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411572052] [2021-06-05 03:54:18,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:18,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:18,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:18,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:18,889 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:20,867 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-06-05 03:54:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 03:54:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:20,881 INFO L225 Difference]: With dead ends: 9010 [2021-06-05 03:54:20,881 INFO L226 Difference]: Without dead ends: 9010 [2021-06-05 03:54:20,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1606.7ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 03:54:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-05 03:54:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-06-05 03:54:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-06-05 03:54:21,001 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-06-05 03:54:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:21,001 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-06-05 03:54:21,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-06-05 03:54:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:21,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:21,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:21,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 03:54:21,210 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-06-05 03:54:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:21,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424328726] [2021-06-05 03:54:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424328726] [2021-06-05 03:54:21,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424328726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318042640] [2021-06-05 03:54:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:21,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:54:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318042640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:21,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:54:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618937198] [2021-06-05 03:54:21,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:21,407 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:22,527 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-06-05 03:54:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 03:54:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:22,553 INFO L225 Difference]: With dead ends: 13558 [2021-06-05 03:54:22,554 INFO L226 Difference]: Without dead ends: 13548 [2021-06-05 03:54:22,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:54:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-06-05 03:54:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-06-05 03:54:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-06-05 03:54:22,726 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-06-05 03:54:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:22,726 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-06-05 03:54:22,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-06-05 03:54:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:22,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:22,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:22,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,950 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-06-05 03:54:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:22,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815436079] [2021-06-05 03:54:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:22,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:22,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815436079] [2021-06-05 03:54:22,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815436079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786654522] [2021-06-05 03:54:22,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:23,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:54:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786654522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:23,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:54:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860334725] [2021-06-05 03:54:23,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:23,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:23,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:23,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:23,143 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:24,233 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-06-05 03:54:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:54:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:24,260 INFO L225 Difference]: With dead ends: 16076 [2021-06-05 03:54:24,260 INFO L226 Difference]: Without dead ends: 16076 [2021-06-05 03:54:24,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:54:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-05 03:54:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-06-05 03:54:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-06-05 03:54:24,448 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-06-05 03:54:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:24,448 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-06-05 03:54:24,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-06-05 03:54:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:24,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:24,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:24,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 03:54:24,673 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-06-05 03:54:24,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:24,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427815561] [2021-06-05 03:54:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:24,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427815561] [2021-06-05 03:54:24,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427815561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672868401] [2021-06-05 03:54:24,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672868401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:24,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:24,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184523095] [2021-06-05 03:54:24,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:24,898 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:26,216 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-06-05 03:54:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:54:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:26,266 INFO L225 Difference]: With dead ends: 8927 [2021-06-05 03:54:26,266 INFO L226 Difference]: Without dead ends: 8899 [2021-06-05 03:54:26,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1016.6ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:54:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-06-05 03:54:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-06-05 03:54:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-06-05 03:54:26,398 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-06-05 03:54:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:26,398 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-06-05 03:54:26,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-06-05 03:54:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:26,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:26,407 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:26,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,607 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-06-05 03:54:26,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:26,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234855838] [2021-06-05 03:54:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234855838] [2021-06-05 03:54:26,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234855838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625105340] [2021-06-05 03:54:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:26,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625105340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:26,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:26,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575614025] [2021-06-05 03:54:26,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:26,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:26,848 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:27,885 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-06-05 03:54:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:54:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:27,899 INFO L225 Difference]: With dead ends: 8770 [2021-06-05 03:54:27,899 INFO L226 Difference]: Without dead ends: 8707 [2021-06-05 03:54:27,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:54:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-06-05 03:54:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-06-05 03:54:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-06-05 03:54:28,002 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-06-05 03:54:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-06-05 03:54:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-06-05 03:54:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:28,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:28,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:28,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 03:54:28,213 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-06-05 03:54:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:28,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140423326] [2021-06-05 03:54:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140423326] [2021-06-05 03:54:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140423326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223122010] [2021-06-05 03:54:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223122010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:28,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:28,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723679473] [2021-06-05 03:54:28,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:28,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:28,485 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:29,119 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-06-05 03:54:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:54:29,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:29,131 INFO L225 Difference]: With dead ends: 6773 [2021-06-05 03:54:29,131 INFO L226 Difference]: Without dead ends: 6734 [2021-06-05 03:54:29,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:54:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-06-05 03:54:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-06-05 03:54:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-06-05 03:54:29,213 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-06-05 03:54:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,213 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-06-05 03:54:29,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-06-05 03:54:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:29,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:29,220 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:29,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,421 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-06-05 03:54:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:29,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790198003] [2021-06-05 03:54:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:29,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790198003] [2021-06-05 03:54:29,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790198003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265227546] [2021-06-05 03:54:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:29,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265227546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:29,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:29,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313125378] [2021-06-05 03:54:29,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:29,650 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:30,568 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-06-05 03:54:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:54:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:30,581 INFO L225 Difference]: With dead ends: 7641 [2021-06-05 03:54:30,581 INFO L226 Difference]: Without dead ends: 7578 [2021-06-05 03:54:30,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:54:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-06-05 03:54:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-06-05 03:54:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-06-05 03:54:30,687 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-06-05 03:54:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:30,687 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-06-05 03:54:30,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-06-05 03:54:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:30,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:30,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:30,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,896 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-06-05 03:54:30,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:30,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362081443] [2021-06-05 03:54:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:30,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:30,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362081443] [2021-06-05 03:54:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362081443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541476003] [2021-06-05 03:54:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:30,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541476003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:31,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144550087] [2021-06-05 03:54:31,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:31,080 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:32,207 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-06-05 03:54:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:54:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:32,220 INFO L225 Difference]: With dead ends: 8374 [2021-06-05 03:54:32,220 INFO L226 Difference]: Without dead ends: 8346 [2021-06-05 03:54:32,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 930.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:54:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-06-05 03:54:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-06-05 03:54:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-06-05 03:54:32,364 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-06-05 03:54:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:32,364 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-06-05 03:54:32,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-06-05 03:54:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:32,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:32,372 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:32,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 03:54:32,573 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-06-05 03:54:32,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:32,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009166336] [2021-06-05 03:54:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009166336] [2021-06-05 03:54:32,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009166336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406717066] [2021-06-05 03:54:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406717066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:32,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:54:32,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755731405] [2021-06-05 03:54:32,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:32,784 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:34,387 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-06-05 03:54:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:54:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:34,401 INFO L225 Difference]: With dead ends: 8593 [2021-06-05 03:54:34,401 INFO L226 Difference]: Without dead ends: 8581 [2021-06-05 03:54:34,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:54:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-06-05 03:54:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-06-05 03:54:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-06-05 03:54:34,564 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-06-05 03:54:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:34,564 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-06-05 03:54:34,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-06-05 03:54:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:34,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:34,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:34,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,781 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-06-05 03:54:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:34,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078983361] [2021-06-05 03:54:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:34,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078983361] [2021-06-05 03:54:34,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078983361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047007056] [2021-06-05 03:54:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047007056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:34,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-06-05 03:54:34,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911369865] [2021-06-05 03:54:34,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:34,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:34,935 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:35,240 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-06-05 03:54:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:35,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:35,253 INFO L225 Difference]: With dead ends: 8392 [2021-06-05 03:54:35,254 INFO L226 Difference]: Without dead ends: 8384 [2021-06-05 03:54:35,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-06-05 03:54:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-06-05 03:54:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-06-05 03:54:35,371 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-06-05 03:54:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:35,371 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-06-05 03:54:35,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-06-05 03:54:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:35,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:35,379 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:35,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:35,581 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-06-05 03:54:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:35,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110376961] [2021-06-05 03:54:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110376961] [2021-06-05 03:54:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110376961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618284516] [2021-06-05 03:54:35,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:35,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618284516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:35,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:35,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947591610] [2021-06-05 03:54:35,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:35,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:35,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:35,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:35,781 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:37,609 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-06-05 03:54:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 03:54:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:37,625 INFO L225 Difference]: With dead ends: 10663 [2021-06-05 03:54:37,625 INFO L226 Difference]: Without dead ends: 10663 [2021-06-05 03:54:37,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1371.4ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:54:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-06-05 03:54:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-06-05 03:54:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-06-05 03:54:37,761 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-06-05 03:54:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-06-05 03:54:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-06-05 03:54:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:37,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:37,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:37,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 03:54:37,971 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-06-05 03:54:37,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:37,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266666431] [2021-06-05 03:54:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266666431] [2021-06-05 03:54:38,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266666431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5688703] [2021-06-05 03:54:38,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:38,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5688703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:38,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:38,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435644041] [2021-06-05 03:54:38,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:38,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:38,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:38,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:38,153 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:39,217 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-06-05 03:54:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:54:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:39,233 INFO L225 Difference]: With dead ends: 9445 [2021-06-05 03:54:39,233 INFO L226 Difference]: Without dead ends: 9417 [2021-06-05 03:54:39,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:54:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-06-05 03:54:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-06-05 03:54:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-06-05 03:54:39,425 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-06-05 03:54:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:39,425 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-06-05 03:54:39,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-06-05 03:54:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:39,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:39,434 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:39,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,634 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-06-05 03:54:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:39,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345776850] [2021-06-05 03:54:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345776850] [2021-06-05 03:54:39,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345776850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177859619] [2021-06-05 03:54:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:39,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177859619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675563363] [2021-06-05 03:54:39,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:39,830 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:41,694 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-06-05 03:54:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 03:54:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:41,710 INFO L225 Difference]: With dead ends: 11207 [2021-06-05 03:54:41,711 INFO L226 Difference]: Without dead ends: 11207 [2021-06-05 03:54:41,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1354.9ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:54:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-06-05 03:54:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-06-05 03:54:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-06-05 03:54:41,923 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-06-05 03:54:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:41,923 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-06-05 03:54:41,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-06-05 03:54:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:41,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:41,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:42,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 03:54:42,135 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-06-05 03:54:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:42,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322511700] [2021-06-05 03:54:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:42,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322511700] [2021-06-05 03:54:42,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322511700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797610415] [2021-06-05 03:54:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:42,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797610415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:42,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:42,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201021007] [2021-06-05 03:54:42,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:42,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:42,359 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:43,747 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-06-05 03:54:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:54:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:43,763 INFO L225 Difference]: With dead ends: 10680 [2021-06-05 03:54:43,764 INFO L226 Difference]: Without dead ends: 10668 [2021-06-05 03:54:43,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:54:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-06-05 03:54:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-06-05 03:54:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-06-05 03:54:43,894 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-06-05 03:54:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:43,895 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-06-05 03:54:43,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-06-05 03:54:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:43,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:43,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:44,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 03:54:44,111 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-06-05 03:54:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:44,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919286525] [2021-06-05 03:54:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919286525] [2021-06-05 03:54:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919286525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401611379] [2021-06-05 03:54:44,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:44,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401611379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119234783] [2021-06-05 03:54:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:44,311 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:45,463 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-06-05 03:54:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:54:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:45,480 INFO L225 Difference]: With dead ends: 9675 [2021-06-05 03:54:45,481 INFO L226 Difference]: Without dead ends: 9654 [2021-06-05 03:54:45,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:54:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-06-05 03:54:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-06-05 03:54:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-06-05 03:54:45,620 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-06-05 03:54:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:45,620 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-06-05 03:54:45,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-06-05 03:54:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:45,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:45,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:45,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 03:54:45,830 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-06-05 03:54:45,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:45,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854732956] [2021-06-05 03:54:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:45,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:45,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854732956] [2021-06-05 03:54:45,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854732956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577195574] [2021-06-05 03:54:45,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577195574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879820439] [2021-06-05 03:54:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:46,007 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:47,387 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-06-05 03:54:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:54:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:47,403 INFO L225 Difference]: With dead ends: 10253 [2021-06-05 03:54:47,403 INFO L226 Difference]: Without dead ends: 10241 [2021-06-05 03:54:47,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1013.9ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:54:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-06-05 03:54:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-06-05 03:54:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-06-05 03:54:47,574 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-06-05 03:54:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:47,574 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-06-05 03:54:47,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-06-05 03:54:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:47,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:47,582 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:47,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,783 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-06-05 03:54:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:47,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093916428] [2021-06-05 03:54:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093916428] [2021-06-05 03:54:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093916428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115628592] [2021-06-05 03:54:47,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115628592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:47,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:47,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491178737] [2021-06-05 03:54:47,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:47,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:47,983 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:48,883 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-06-05 03:54:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:54:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:48,900 INFO L225 Difference]: With dead ends: 10693 [2021-06-05 03:54:48,901 INFO L226 Difference]: Without dead ends: 10630 [2021-06-05 03:54:48,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:54:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-06-05 03:54:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-06-05 03:54:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-06-05 03:54:49,041 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-06-05 03:54:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:49,041 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-06-05 03:54:49,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-06-05 03:54:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:49,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:49,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:49,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,251 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-06-05 03:54:49,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:49,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225432444] [2021-06-05 03:54:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225432444] [2021-06-05 03:54:49,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225432444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147084565] [2021-06-05 03:54:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:49,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147084565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:49,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950793141] [2021-06-05 03:54:49,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:49,448 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:50,742 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-06-05 03:54:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:54:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:50,760 INFO L225 Difference]: With dead ends: 11280 [2021-06-05 03:54:50,760 INFO L226 Difference]: Without dead ends: 11245 [2021-06-05 03:54:50,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:54:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-06-05 03:54:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-06-05 03:54:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-06-05 03:54:50,901 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-06-05 03:54:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:50,901 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-06-05 03:54:50,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-06-05 03:54:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:50,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:50,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:51,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,125 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-06-05 03:54:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448962840] [2021-06-05 03:54:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:51,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448962840] [2021-06-05 03:54:51,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448962840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648496276] [2021-06-05 03:54:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648496276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:51,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416082046] [2021-06-05 03:54:51,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:51,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:51,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:51,291 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:52,703 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-06-05 03:54:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:54:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:52,725 INFO L225 Difference]: With dead ends: 11657 [2021-06-05 03:54:52,725 INFO L226 Difference]: Without dead ends: 11645 [2021-06-05 03:54:52,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1027.4ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:54:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-06-05 03:54:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-06-05 03:54:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-06-05 03:54:52,866 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-06-05 03:54:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:52,866 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-06-05 03:54:52,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-06-05 03:54:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:52,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:52,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,076 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-06-05 03:54:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103467821] [2021-06-05 03:54:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103467821] [2021-06-05 03:54:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103467821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417932599] [2021-06-05 03:54:53,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:53,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417932599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:53,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 03:54:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942731245] [2021-06-05 03:54:53,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:53,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:53,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:53,212 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:53,571 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-06-05 03:54:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:54:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:53,600 INFO L225 Difference]: With dead ends: 17556 [2021-06-05 03:54:53,600 INFO L226 Difference]: Without dead ends: 17556 [2021-06-05 03:54:53,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-06-05 03:54:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-06-05 03:54:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-06-05 03:54:53,844 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-06-05 03:54:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-06-05 03:54:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-06-05 03:54:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:53,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:53,859 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:54,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 03:54:54,060 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-06-05 03:54:54,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:54,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104223773] [2021-06-05 03:54:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:54,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:54,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104223773] [2021-06-05 03:54:54,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104223773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676570512] [2021-06-05 03:54:54,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:54:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676570512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:54,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 03:54:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660417966] [2021-06-05 03:54:54,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:54,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:54,210 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 03:54:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:54,540 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-06-05 03:54:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:54,566 INFO L225 Difference]: With dead ends: 14487 [2021-06-05 03:54:54,566 INFO L226 Difference]: Without dead ends: 14473 [2021-06-05 03:54:54,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-06-05 03:54:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-06-05 03:54:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-06-05 03:54:54,760 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-06-05 03:54:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:54,760 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-06-05 03:54:54,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 03:54:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-06-05 03:54:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:54,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:54,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:54,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,975 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-06-05 03:54:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:54,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156380031] [2021-06-05 03:54:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:55,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156380031] [2021-06-05 03:54:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156380031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722882508] [2021-06-05 03:54:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:54:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:55,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722882508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:55,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 03:54:55,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222886743] [2021-06-05 03:54:55,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:55,114 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:55,418 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-06-05 03:54:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:55,443 INFO L225 Difference]: With dead ends: 13632 [2021-06-05 03:54:55,443 INFO L226 Difference]: Without dead ends: 13610 [2021-06-05 03:54:55,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-06-05 03:54:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-06-05 03:54:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-06-05 03:54:55,662 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-06-05 03:54:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:55,662 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-06-05 03:54:55,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-06-05 03:54:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:55,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:55,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:55,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,875 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-06-05 03:54:55,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:55,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638549784] [2021-06-05 03:54:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:55,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:55,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638549784] [2021-06-05 03:54:55,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638549784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104181337] [2021-06-05 03:54:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104181337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:56,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049172022] [2021-06-05 03:54:56,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:56,082 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:57,916 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-06-05 03:54:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 03:54:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:57,937 INFO L225 Difference]: With dead ends: 12080 [2021-06-05 03:54:57,937 INFO L226 Difference]: Without dead ends: 12080 [2021-06-05 03:54:57,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1422.1ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:54:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-06-05 03:54:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-06-05 03:54:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-06-05 03:54:58,102 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-06-05 03:54:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:58,102 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-06-05 03:54:58,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-06-05 03:54:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:54:58,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:58,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:58,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 03:54:58,315 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-06-05 03:54:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:58,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403700221] [2021-06-05 03:54:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:58,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403700221] [2021-06-05 03:54:58,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403700221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902715255] [2021-06-05 03:54:58,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:58,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:54:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902715255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:54:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819019598] [2021-06-05 03:54:58,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:58,581 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:59,892 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-06-05 03:54:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:54:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:54:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:59,911 INFO L225 Difference]: With dead ends: 10961 [2021-06-05 03:54:59,911 INFO L226 Difference]: Without dead ends: 10947 [2021-06-05 03:54:59,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 03:54:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-06-05 03:55:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-06-05 03:55:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-06-05 03:55:00,085 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-06-05 03:55:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:00,085 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-06-05 03:55:00,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-06-05 03:55:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:00,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:00,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:00,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:00,301 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-06-05 03:55:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:00,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151071016] [2021-06-05 03:55:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:00,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:00,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151071016] [2021-06-05 03:55:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151071016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491250046] [2021-06-05 03:55:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491250046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:00,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:55:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080362414] [2021-06-05 03:55:00,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:00,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:00,477 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:01,375 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-06-05 03:55:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:55:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:01,394 INFO L225 Difference]: With dead ends: 10752 [2021-06-05 03:55:01,394 INFO L226 Difference]: Without dead ends: 10689 [2021-06-05 03:55:01,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:55:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-06-05 03:55:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-06-05 03:55:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-06-05 03:55:01,564 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-06-05 03:55:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:01,564 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-06-05 03:55:01,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-06-05 03:55:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:01,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:01,577 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:01,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 03:55:01,778 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-06-05 03:55:01,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:01,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968359886] [2021-06-05 03:55:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:01,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968359886] [2021-06-05 03:55:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968359886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065264374] [2021-06-05 03:55:01,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:01,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:02,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065264374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:02,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:02,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416751508] [2021-06-05 03:55:02,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:02,025 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:02,920 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-06-05 03:55:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:55:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:02,936 INFO L225 Difference]: With dead ends: 9191 [2021-06-05 03:55:02,936 INFO L226 Difference]: Without dead ends: 9187 [2021-06-05 03:55:02,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:55:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-06-05 03:55:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-06-05 03:55:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-06-05 03:55:03,073 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-06-05 03:55:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:03,073 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-06-05 03:55:03,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-06-05 03:55:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:03,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:03,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,286 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-06-05 03:55:03,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:03,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356153280] [2021-06-05 03:55:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356153280] [2021-06-05 03:55:03,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356153280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567203100] [2021-06-05 03:55:03,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567203100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:03,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:55:03,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896762222] [2021-06-05 03:55:03,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:03,469 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:04,110 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-06-05 03:55:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:55:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:04,150 INFO L225 Difference]: With dead ends: 19794 [2021-06-05 03:55:04,150 INFO L226 Difference]: Without dead ends: 19766 [2021-06-05 03:55:04,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:55:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-06-05 03:55:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-06-05 03:55:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-06-05 03:55:04,398 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-06-05 03:55:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:04,398 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-06-05 03:55:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-06-05 03:55:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:04,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:04,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:04,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-06-05 03:55:04,614 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-06-05 03:55:04,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:04,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840769789] [2021-06-05 03:55:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:04,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840769789] [2021-06-05 03:55:04,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840769789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752407311] [2021-06-05 03:55:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:04,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752407311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:04,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435793402] [2021-06-05 03:55:04,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:04,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:04,823 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:05,574 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-06-05 03:55:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:55:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:05,629 INFO L225 Difference]: With dead ends: 24314 [2021-06-05 03:55:05,629 INFO L226 Difference]: Without dead ends: 24300 [2021-06-05 03:55:05,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:55:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-06-05 03:55:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-06-05 03:55:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-06-05 03:55:05,962 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-06-05 03:55:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:05,962 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-06-05 03:55:05,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-06-05 03:55:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:05,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:05,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:06,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,185 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-06-05 03:55:06,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:06,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511405210] [2021-06-05 03:55:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:06,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:06,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511405210] [2021-06-05 03:55:06,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511405210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651839106] [2021-06-05 03:55:06,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:06,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:06,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651839106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:06,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:55:06,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230473489] [2021-06-05 03:55:06,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:06,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:06,367 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:07,180 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-06-05 03:55:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:55:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:07,203 INFO L225 Difference]: With dead ends: 12255 [2021-06-05 03:55:07,203 INFO L226 Difference]: Without dead ends: 12241 [2021-06-05 03:55:07,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 03:55:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-06-05 03:55:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-06-05 03:55:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-06-05 03:55:07,389 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-06-05 03:55:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:07,389 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-06-05 03:55:07,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-06-05 03:55:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:07,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:07,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:07,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 03:55:07,606 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:07,607 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-06-05 03:55:07,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:07,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889619817] [2021-06-05 03:55:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889619817] [2021-06-05 03:55:07,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889619817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341616398] [2021-06-05 03:55:07,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:07,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341616398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:07,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:07,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760236715] [2021-06-05 03:55:07,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:07,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:07,803 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:08,559 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-06-05 03:55:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:55:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:08,587 INFO L225 Difference]: With dead ends: 12450 [2021-06-05 03:55:08,587 INFO L226 Difference]: Without dead ends: 12408 [2021-06-05 03:55:08,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:55:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-06-05 03:55:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-06-05 03:55:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-06-05 03:55:08,790 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-06-05 03:55:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:08,790 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-06-05 03:55:08,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-06-05 03:55:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:08,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:08,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:09,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:09,008 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-06-05 03:55:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:09,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620179477] [2021-06-05 03:55:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:09,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:09,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620179477] [2021-06-05 03:55:09,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620179477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730451952] [2021-06-05 03:55:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:09,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:09,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:09,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:09,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730451952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:09,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:55:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519533791] [2021-06-05 03:55:09,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:09,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:09,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:09,188 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:09,754 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-06-05 03:55:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:55:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:09,782 INFO L225 Difference]: With dead ends: 15314 [2021-06-05 03:55:09,782 INFO L226 Difference]: Without dead ends: 15307 [2021-06-05 03:55:09,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:55:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-06-05 03:55:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-06-05 03:55:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-06-05 03:55:09,978 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-06-05 03:55:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:09,978 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-06-05 03:55:09,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-06-05 03:55:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:09,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:09,994 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:10,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,195 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-06-05 03:55:10,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:10,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951919302] [2021-06-05 03:55:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951919302] [2021-06-05 03:55:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951919302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434067510] [2021-06-05 03:55:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:55:10,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434067510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:10,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55784958] [2021-06-05 03:55:10,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:10,402 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:10,892 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-06-05 03:55:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:55:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:10,915 INFO L225 Difference]: With dead ends: 12355 [2021-06-05 03:55:10,915 INFO L226 Difference]: Without dead ends: 12316 [2021-06-05 03:55:10,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:55:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-06-05 03:55:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-06-05 03:55:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-06-05 03:55:11,151 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-06-05 03:55:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:11,152 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-06-05 03:55:11,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-06-05 03:55:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:11,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:11,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:11,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:11,369 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-06-05 03:55:11,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:11,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923039495] [2021-06-05 03:55:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:11,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923039495] [2021-06-05 03:55:11,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923039495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44979615] [2021-06-05 03:55:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:11,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:11,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44979615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:11,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:11,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119097638] [2021-06-05 03:55:11,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:11,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:11,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:11,554 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:12,049 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-06-05 03:55:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:12,076 INFO L225 Difference]: With dead ends: 14434 [2021-06-05 03:55:12,077 INFO L226 Difference]: Without dead ends: 14427 [2021-06-05 03:55:12,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-06-05 03:55:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-06-05 03:55:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-06-05 03:55:12,286 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-06-05 03:55:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:12,286 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-06-05 03:55:12,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-06-05 03:55:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:12,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:12,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:12,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,503 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-06-05 03:55:12,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:12,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089168173] [2021-06-05 03:55:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089168173] [2021-06-05 03:55:12,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089168173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801697964] [2021-06-05 03:55:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801697964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:12,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892273221] [2021-06-05 03:55:12,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:12,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:12,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:12,684 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:13,834 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-06-05 03:55:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:55:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:13,869 INFO L225 Difference]: With dead ends: 18950 [2021-06-05 03:55:13,870 INFO L226 Difference]: Without dead ends: 18922 [2021-06-05 03:55:13,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:55:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-06-05 03:55:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-06-05 03:55:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-06-05 03:55:14,169 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-06-05 03:55:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:14,169 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-06-05 03:55:14,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-06-05 03:55:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:14,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:14,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:14,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 03:55:14,386 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-06-05 03:55:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908772552] [2021-06-05 03:55:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:14,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908772552] [2021-06-05 03:55:14,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908772552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776506777] [2021-06-05 03:55:14,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:14,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776506777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:14,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:14,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669764600] [2021-06-05 03:55:14,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:14,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:14,569 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:15,624 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-06-05 03:55:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:55:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:15,651 INFO L225 Difference]: With dead ends: 13312 [2021-06-05 03:55:15,652 INFO L226 Difference]: Without dead ends: 13300 [2021-06-05 03:55:15,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:55:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-06-05 03:55:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-06-05 03:55:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-06-05 03:55:15,860 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-06-05 03:55:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:15,860 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-06-05 03:55:15,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-06-05 03:55:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:15,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:15,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:16,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,078 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-06-05 03:55:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:16,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934871957] [2021-06-05 03:55:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:16,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934871957] [2021-06-05 03:55:16,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934871957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742037345] [2021-06-05 03:55:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742037345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:16,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:55:16,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658347761] [2021-06-05 03:55:16,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:16,260 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:17,207 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-06-05 03:55:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:55:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:17,233 INFO L225 Difference]: With dead ends: 12947 [2021-06-05 03:55:17,233 INFO L226 Difference]: Without dead ends: 12926 [2021-06-05 03:55:17,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:55:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-06-05 03:55:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-06-05 03:55:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-06-05 03:55:17,471 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-06-05 03:55:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:17,471 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-06-05 03:55:17,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-06-05 03:55:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:17,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:17,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:17,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 03:55:17,689 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-06-05 03:55:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:17,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600772901] [2021-06-05 03:55:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:17,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600772901] [2021-06-05 03:55:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600772901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287924713] [2021-06-05 03:55:17,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:17,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:55:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:17,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287924713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:17,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:17,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:17,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976570397] [2021-06-05 03:55:17,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:17,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:17,928 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:18,819 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-06-05 03:55:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:55:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:18,844 INFO L225 Difference]: With dead ends: 13151 [2021-06-05 03:55:18,844 INFO L226 Difference]: Without dead ends: 13088 [2021-06-05 03:55:18,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 644.6ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:55:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-05 03:55:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-06-05 03:55:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-06-05 03:55:19,060 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-06-05 03:55:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:19,060 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-06-05 03:55:19,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-06-05 03:55:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:19,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:19,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:19,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 03:55:19,278 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-06-05 03:55:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:19,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056285828] [2021-06-05 03:55:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056285828] [2021-06-05 03:55:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056285828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582780894] [2021-06-05 03:55:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:19,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582780894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350545421] [2021-06-05 03:55:19,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:19,479 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:20,385 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-06-05 03:55:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:55:20,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:20,446 INFO L225 Difference]: With dead ends: 25464 [2021-06-05 03:55:20,447 INFO L226 Difference]: Without dead ends: 25450 [2021-06-05 03:55:20,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:55:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-06-05 03:55:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-06-05 03:55:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-06-05 03:55:20,829 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-06-05 03:55:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:20,829 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-06-05 03:55:20,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-06-05 03:55:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:20,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:20,848 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:21,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 03:55:21,049 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-06-05 03:55:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:21,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86621947] [2021-06-05 03:55:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:21,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86621947] [2021-06-05 03:55:21,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86621947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440498975] [2021-06-05 03:55:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:21,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440498975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:21,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:21,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776345045] [2021-06-05 03:55:21,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:21,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:21,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:21,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:21,240 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,300 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-06-05 03:55:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:55:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,334 INFO L225 Difference]: With dead ends: 16105 [2021-06-05 03:55:22,334 INFO L226 Difference]: Without dead ends: 16097 [2021-06-05 03:55:22,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:55:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-06-05 03:55:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-06-05 03:55:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-06-05 03:55:22,602 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-06-05 03:55:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,602 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-06-05 03:55:22,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-06-05 03:55:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:22,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:22,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 03:55:22,825 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-06-05 03:55:22,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:22,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347618106] [2021-06-05 03:55:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:22,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347618106] [2021-06-05 03:55:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347618106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521558913] [2021-06-05 03:55:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:22,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521558913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81775221] [2021-06-05 03:55:23,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:23,033 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:24,539 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-06-05 03:55:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:55:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:24,573 INFO L225 Difference]: With dead ends: 16652 [2021-06-05 03:55:24,573 INFO L226 Difference]: Without dead ends: 16644 [2021-06-05 03:55:24,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 03:55:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-06-05 03:55:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-06-05 03:55:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-06-05 03:55:24,861 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-06-05 03:55:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:24,862 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-06-05 03:55:24,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-06-05 03:55:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:24,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:24,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:25,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,087 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-06-05 03:55:25,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:25,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300510738] [2021-06-05 03:55:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:25,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300510738] [2021-06-05 03:55:25,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300510738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803512207] [2021-06-05 03:55:25,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:25,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803512207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902278237] [2021-06-05 03:55:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:25,287 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:26,373 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-06-05 03:55:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:55:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:26,406 INFO L225 Difference]: With dead ends: 16318 [2021-06-05 03:55:26,406 INFO L226 Difference]: Without dead ends: 16297 [2021-06-05 03:55:26,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 03:55:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-06-05 03:55:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-06-05 03:55:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-06-05 03:55:26,680 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-06-05 03:55:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:26,680 INFO L482 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-06-05 03:55:26,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-06-05 03:55:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:26,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:26,703 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:26,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,903 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-06-05 03:55:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:26,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262183225] [2021-06-05 03:55:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:26,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262183225] [2021-06-05 03:55:26,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262183225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833622524] [2021-06-05 03:55:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:26,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833622524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:27,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516459943] [2021-06-05 03:55:27,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:27,090 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:28,430 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-06-05 03:55:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:55:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:28,468 INFO L225 Difference]: With dead ends: 17791 [2021-06-05 03:55:28,469 INFO L226 Difference]: Without dead ends: 17783 [2021-06-05 03:55:28,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:55:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-06-05 03:55:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-06-05 03:55:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-06-05 03:55:28,754 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-06-05 03:55:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:28,755 INFO L482 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-06-05 03:55:28,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-06-05 03:55:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:28,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:28,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:28,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 03:55:28,982 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-06-05 03:55:28,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:28,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786516946] [2021-06-05 03:55:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:29,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:29,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786516946] [2021-06-05 03:55:29,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786516946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041665583] [2021-06-05 03:55:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:29,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:29,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:29,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041665583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:29,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:29,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269142979] [2021-06-05 03:55:29,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:29,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:29,174 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:29,951 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-06-05 03:55:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:55:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:29,992 INFO L225 Difference]: With dead ends: 22000 [2021-06-05 03:55:29,992 INFO L226 Difference]: Without dead ends: 21980 [2021-06-05 03:55:29,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:55:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-06-05 03:55:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-06-05 03:55:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-06-05 03:55:30,310 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-06-05 03:55:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:30,310 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-06-05 03:55:30,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-06-05 03:55:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:30,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:30,331 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:30,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 03:55:30,532 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-06-05 03:55:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:30,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763995247] [2021-06-05 03:55:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:30,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763995247] [2021-06-05 03:55:30,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763995247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469832400] [2021-06-05 03:55:30,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:30,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:55:30,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:30,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469832400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:30,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:30,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041082364] [2021-06-05 03:55:30,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:30,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:30,733 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:31,496 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-06-05 03:55:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:55:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:31,524 INFO L225 Difference]: With dead ends: 16102 [2021-06-05 03:55:31,524 INFO L226 Difference]: Without dead ends: 16063 [2021-06-05 03:55:31,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:55:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-06-05 03:55:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-06-05 03:55:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-06-05 03:55:31,775 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-06-05 03:55:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:31,775 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-06-05 03:55:31,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-06-05 03:55:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:31,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:31,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 03:55:31,998 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-06-05 03:55:32,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:32,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839868980] [2021-06-05 03:55:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839868980] [2021-06-05 03:55:32,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839868980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365560388] [2021-06-05 03:55:32,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365560388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:32,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:32,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56710419] [2021-06-05 03:55:32,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:32,191 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:32,876 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-06-05 03:55:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:55:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:32,908 INFO L225 Difference]: With dead ends: 16364 [2021-06-05 03:55:32,908 INFO L226 Difference]: Without dead ends: 16325 [2021-06-05 03:55:32,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:55:32,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-05 03:55:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-06-05 03:55:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-06-05 03:55:33,190 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-06-05 03:55:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:33,190 INFO L482 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-06-05 03:55:33,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-06-05 03:55:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:33,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:33,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:33,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:33,412 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:33,412 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-06-05 03:55:33,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:33,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223227738] [2021-06-05 03:55:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:33,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223227738] [2021-06-05 03:55:33,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223227738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567009927] [2021-06-05 03:55:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:33,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:33,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:33,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567009927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:33,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:33,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:33,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028692914] [2021-06-05 03:55:33,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:33,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:33,616 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:34,507 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-06-05 03:55:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:55:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:34,547 INFO L225 Difference]: With dead ends: 17402 [2021-06-05 03:55:34,548 INFO L226 Difference]: Without dead ends: 17346 [2021-06-05 03:55:34,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:55:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-06-05 03:55:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-06-05 03:55:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-06-05 03:55:34,920 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-06-05 03:55:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-06-05 03:55:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-06-05 03:55:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:34,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:34,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:35,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,143 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-06-05 03:55:35,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:35,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114149978] [2021-06-05 03:55:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:35,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114149978] [2021-06-05 03:55:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114149978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428932359] [2021-06-05 03:55:35,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:35,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428932359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:35,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:35,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376612616] [2021-06-05 03:55:35,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:35,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:35,326 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:36,427 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-06-05 03:55:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:55:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:36,466 INFO L225 Difference]: With dead ends: 17837 [2021-06-05 03:55:36,466 INFO L226 Difference]: Without dead ends: 17809 [2021-06-05 03:55:36,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:55:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-06-05 03:55:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-06-05 03:55:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-06-05 03:55:36,768 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-06-05 03:55:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:36,768 INFO L482 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-06-05 03:55:36,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-06-05 03:55:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:36,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:36,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:36,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 03:55:36,992 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-06-05 03:55:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:36,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609061839] [2021-06-05 03:55:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609061839] [2021-06-05 03:55:37,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609061839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986473579] [2021-06-05 03:55:37,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:55:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986473579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:37,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:55:37,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47402037] [2021-06-05 03:55:37,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:37,166 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:38,591 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-06-05 03:55:38,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:55:38,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:38,625 INFO L225 Difference]: With dead ends: 18031 [2021-06-05 03:55:38,625 INFO L226 Difference]: Without dead ends: 18031 [2021-06-05 03:55:38,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:55:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-06-05 03:55:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-06-05 03:55:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-06-05 03:55:38,990 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-06-05 03:55:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:38,990 INFO L482 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-06-05 03:55:38,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-06-05 03:55:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:39,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:39,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:39,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 03:55:39,214 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-06-05 03:55:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:39,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861693467] [2021-06-05 03:55:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:39,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:39,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861693467] [2021-06-05 03:55:39,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861693467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907880967] [2021-06-05 03:55:39,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:39,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:55:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:39,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907880967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:39,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:39,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152664357] [2021-06-05 03:55:39,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:39,378 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:41,356 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-06-05 03:55:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 03:55:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:41,429 INFO L225 Difference]: With dead ends: 35647 [2021-06-05 03:55:41,429 INFO L226 Difference]: Without dead ends: 35617 [2021-06-05 03:55:41,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1299.9ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:55:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-06-05 03:55:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-06-05 03:55:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-06-05 03:55:41,919 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-06-05 03:55:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:41,919 INFO L482 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-06-05 03:55:41,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-06-05 03:55:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:41,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:41,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:42,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:42,148 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-06-05 03:55:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:42,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254630616] [2021-06-05 03:55:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:42,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254630616] [2021-06-05 03:55:42,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254630616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284200214] [2021-06-05 03:55:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:42,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:55:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:42,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284200214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:42,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:42,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:42,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469776017] [2021-06-05 03:55:42,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:42,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:42,415 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:44,371 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-06-05 03:55:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 03:55:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:44,461 INFO L225 Difference]: With dead ends: 41975 [2021-06-05 03:55:44,461 INFO L226 Difference]: Without dead ends: 41947 [2021-06-05 03:55:44,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1400.7ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 03:55:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-06-05 03:55:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-06-05 03:55:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-06-05 03:55:44,995 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-06-05 03:55:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:44,995 INFO L482 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-06-05 03:55:44,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-06-05 03:55:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:45,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:45,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:45,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 03:55:45,223 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-06-05 03:55:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:45,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358969248] [2021-06-05 03:55:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358969248] [2021-06-05 03:55:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358969248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215698260] [2021-06-05 03:55:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215698260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:45,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:45,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455537757] [2021-06-05 03:55:45,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:45,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:45,373 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:47,316 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-06-05 03:55:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 03:55:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:47,398 INFO L225 Difference]: With dead ends: 36580 [2021-06-05 03:55:47,398 INFO L226 Difference]: Without dead ends: 36556 [2021-06-05 03:55:47,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1265.5ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 03:55:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-06-05 03:55:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-06-05 03:55:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-06-05 03:55:47,914 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-06-05 03:55:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:47,914 INFO L482 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-06-05 03:55:47,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-06-05 03:55:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:47,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:47,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:48,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:48,143 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-06-05 03:55:48,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:48,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250853104] [2021-06-05 03:55:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:48,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:48,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250853104] [2021-06-05 03:55:48,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250853104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42854667] [2021-06-05 03:55:48,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:48,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:48,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:48,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:48,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42854667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:48,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:48,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462613361] [2021-06-05 03:55:48,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:48,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:48,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:48,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:48,332 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:49,974 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-06-05 03:55:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 03:55:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:50,064 INFO L225 Difference]: With dead ends: 41528 [2021-06-05 03:55:50,065 INFO L226 Difference]: Without dead ends: 41528 [2021-06-05 03:55:50,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1042.4ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:55:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-06-05 03:55:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-06-05 03:55:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-06-05 03:55:50,704 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-06-05 03:55:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:50,704 INFO L482 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-06-05 03:55:50,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-06-05 03:55:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:50,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:50,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:50,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 03:55:50,932 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-06-05 03:55:50,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:50,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267986406] [2021-06-05 03:55:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:50,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267986406] [2021-06-05 03:55:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267986406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268039193] [2021-06-05 03:55:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:51,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268039193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:51,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866886040] [2021-06-05 03:55:51,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:51,130 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:52,617 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-06-05 03:55:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:55:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:52,674 INFO L225 Difference]: With dead ends: 27513 [2021-06-05 03:55:52,674 INFO L226 Difference]: Without dead ends: 27489 [2021-06-05 03:55:52,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 966.5ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 03:55:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-06-05 03:55:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-06-05 03:55:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-06-05 03:55:53,124 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-06-05 03:55:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:53,124 INFO L482 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-06-05 03:55:53,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-06-05 03:55:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:53,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:53,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:53,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,353 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-06-05 03:55:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:53,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812006085] [2021-06-05 03:55:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812006085] [2021-06-05 03:55:53,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812006085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38727756] [2021-06-05 03:55:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38727756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:53,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:53,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365792541] [2021-06-05 03:55:53,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:53,505 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:54,689 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-06-05 03:55:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:55:54,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:54,748 INFO L225 Difference]: With dead ends: 26218 [2021-06-05 03:55:54,748 INFO L226 Difference]: Without dead ends: 26184 [2021-06-05 03:55:54,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:55:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-06-05 03:55:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-06-05 03:55:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-06-05 03:55:55,165 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-06-05 03:55:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:55,165 INFO L482 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-06-05 03:55:55,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-06-05 03:55:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:55,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:55,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:55,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 03:55:55,393 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-06-05 03:55:55,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:55,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002537160] [2021-06-05 03:55:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:55,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002537160] [2021-06-05 03:55:55,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002537160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804338294] [2021-06-05 03:55:55,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:55,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:55,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:55,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804338294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:55,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328952387] [2021-06-05 03:55:55,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:55,543 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:57,176 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-06-05 03:55:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:55:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:57,275 INFO L225 Difference]: With dead ends: 44899 [2021-06-05 03:55:57,276 INFO L226 Difference]: Without dead ends: 44892 [2021-06-05 03:55:57,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1070.5ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 03:55:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-06-05 03:55:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-06-05 03:55:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-06-05 03:55:57,975 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-06-05 03:55:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:57,975 INFO L482 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-06-05 03:55:57,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-06-05 03:55:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:55:58,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:58,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:58,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:58,205 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-06-05 03:55:58,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:58,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835076925] [2021-06-05 03:55:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835076925] [2021-06-05 03:55:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835076925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094644705] [2021-06-05 03:55:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:58,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:55:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:55:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:58,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094644705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:58,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:58,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:55:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062356865] [2021-06-05 03:55:58,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:58,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:58,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:58,373 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:59,820 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-06-05 03:55:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 03:55:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:55:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:59,902 INFO L225 Difference]: With dead ends: 37958 [2021-06-05 03:55:59,902 INFO L226 Difference]: Without dead ends: 37918 [2021-06-05 03:55:59,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:55:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-06-05 03:56:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-06-05 03:56:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-06-05 03:56:00,415 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-06-05 03:56:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:00,415 INFO L482 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-06-05 03:56:00,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-06-05 03:56:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:00,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:00,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:00,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,643 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-06-05 03:56:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:00,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704518546] [2021-06-05 03:56:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:00,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704518546] [2021-06-05 03:56:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704518546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136837341] [2021-06-05 03:56:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:56:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:00,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136837341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:00,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:56:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057408304] [2021-06-05 03:56:00,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:00,801 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:02,988 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-06-05 03:56:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 03:56:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:03,091 INFO L225 Difference]: With dead ends: 43788 [2021-06-05 03:56:03,091 INFO L226 Difference]: Without dead ends: 43753 [2021-06-05 03:56:03,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1467.4ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 03:56:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-06-05 03:56:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-06-05 03:56:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-06-05 03:56:03,715 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-06-05 03:56:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:03,715 INFO L482 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-06-05 03:56:03,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-06-05 03:56:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:03,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:03,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:03,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:03,961 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:03,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-06-05 03:56:03,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:03,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516632600] [2021-06-05 03:56:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:04,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516632600] [2021-06-05 03:56:04,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516632600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045787129] [2021-06-05 03:56:04,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:04,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:04,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:56:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:04,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045787129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:04,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:56:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759554420] [2021-06-05 03:56:04,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:04,132 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:05,224 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-06-05 03:56:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:56:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:05,301 INFO L225 Difference]: With dead ends: 34933 [2021-06-05 03:56:05,301 INFO L226 Difference]: Without dead ends: 34912 [2021-06-05 03:56:05,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:56:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-06-05 03:56:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-06-05 03:56:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-06-05 03:56:05,917 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-06-05 03:56:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:05,918 INFO L482 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-06-05 03:56:05,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-06-05 03:56:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:05,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:05,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:06,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 03:56:06,150 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-06-05 03:56:06,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:06,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584335285] [2021-06-05 03:56:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:06,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584335285] [2021-06-05 03:56:06,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584335285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758781190] [2021-06-05 03:56:06,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:56:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:56:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758781190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:06,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:56:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570389415] [2021-06-05 03:56:06,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:06,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:06,313 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:07,126 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-06-05 03:56:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:56:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:07,210 INFO L225 Difference]: With dead ends: 39052 [2021-06-05 03:56:07,210 INFO L226 Difference]: Without dead ends: 39052 [2021-06-05 03:56:07,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:56:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-06-05 03:56:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-06-05 03:56:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-06-05 03:56:07,762 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-06-05 03:56:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:07,763 INFO L482 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-06-05 03:56:07,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-06-05 03:56:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:07,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:07,796 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:07,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,996 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-06-05 03:56:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354962481] [2021-06-05 03:56:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354962481] [2021-06-05 03:56:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354962481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650190964] [2021-06-05 03:56:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:08,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:08,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650190964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:08,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:08,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887212688] [2021-06-05 03:56:08,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:08,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:08,180 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:09,927 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-06-05 03:56:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 03:56:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:10,015 INFO L225 Difference]: With dead ends: 36484 [2021-06-05 03:56:10,015 INFO L226 Difference]: Without dead ends: 36484 [2021-06-05 03:56:10,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1053.4ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 03:56:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-06-05 03:56:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-06-05 03:56:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-06-05 03:56:10,627 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-06-05 03:56:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:10,627 INFO L482 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-06-05 03:56:10,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-06-05 03:56:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:10,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:10,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:10,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 03:56:10,861 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-06-05 03:56:10,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:10,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853866779] [2021-06-05 03:56:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:10,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:10,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853866779] [2021-06-05 03:56:10,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853866779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:10,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583867960] [2021-06-05 03:56:10,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:10,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:56:10,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:10,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583867960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:11,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:11,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273325179] [2021-06-05 03:56:11,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:11,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:11,043 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:12,643 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-06-05 03:56:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:56:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:12,724 INFO L225 Difference]: With dead ends: 36924 [2021-06-05 03:56:12,724 INFO L226 Difference]: Without dead ends: 36924 [2021-06-05 03:56:12,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1048.1ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:56:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-06-05 03:56:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-06-05 03:56:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-06-05 03:56:13,241 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-06-05 03:56:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:13,241 INFO L482 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-06-05 03:56:13,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-06-05 03:56:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:13,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:13,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:13,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 03:56:13,634 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-06-05 03:56:13,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:13,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552645978] [2021-06-05 03:56:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:13,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552645978] [2021-06-05 03:56:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552645978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330881414] [2021-06-05 03:56:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:13,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:13,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:56:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:13,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330881414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:13,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:13,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:56:13,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709280286] [2021-06-05 03:56:13,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:13,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:13,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:13,822 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:14,622 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-06-05 03:56:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:56:14,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:14,703 INFO L225 Difference]: With dead ends: 36712 [2021-06-05 03:56:14,703 INFO L226 Difference]: Without dead ends: 36694 [2021-06-05 03:56:14,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:56:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-06-05 03:56:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-06-05 03:56:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-06-05 03:56:15,254 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-06-05 03:56:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:15,254 INFO L482 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-06-05 03:56:15,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-06-05 03:56:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:15,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:15,288 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:15,493 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-06-05 03:56:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871751959] [2021-06-05 03:56:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:15,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:15,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871751959] [2021-06-05 03:56:15,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871751959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:15,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093196501] [2021-06-05 03:56:15,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093196501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:15,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:15,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432322188] [2021-06-05 03:56:15,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:15,685 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:17,351 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-06-05 03:56:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:56:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:17,419 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 03:56:17,419 INFO L226 Difference]: Without dead ends: 30533 [2021-06-05 03:56:17,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1142.8ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:56:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-06-05 03:56:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-06-05 03:56:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-06-05 03:56:18,059 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-06-05 03:56:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:18,060 INFO L482 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-06-05 03:56:18,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-06-05 03:56:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:18,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:18,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:18,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:18,298 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-06-05 03:56:18,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:18,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977170310] [2021-06-05 03:56:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:18,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977170310] [2021-06-05 03:56:18,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977170310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060384052] [2021-06-05 03:56:18,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060384052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:18,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:18,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331124932] [2021-06-05 03:56:18,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:18,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:18,484 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:20,066 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-06-05 03:56:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:56:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:20,127 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 03:56:20,127 INFO L226 Difference]: Without dead ends: 30531 [2021-06-05 03:56:20,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1058.0ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:56:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-06-05 03:56:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-06-05 03:56:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-06-05 03:56:20,865 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-06-05 03:56:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:20,865 INFO L482 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-06-05 03:56:20,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-06-05 03:56:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:20,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:20,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:21,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 03:56:21,100 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-06-05 03:56:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:21,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6723632] [2021-06-05 03:56:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:21,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:21,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6723632] [2021-06-05 03:56:21,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6723632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530298314] [2021-06-05 03:56:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:21,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:21,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:21,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530298314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:21,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:21,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689620041] [2021-06-05 03:56:21,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:21,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:21,282 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:22,684 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-06-05 03:56:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:56:22,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:22,740 INFO L225 Difference]: With dead ends: 26398 [2021-06-05 03:56:22,741 INFO L226 Difference]: Without dead ends: 26377 [2021-06-05 03:56:22,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 791.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:56:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-06-05 03:56:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-06-05 03:56:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-06-05 03:56:23,182 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-06-05 03:56:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:23,182 INFO L482 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-06-05 03:56:23,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-06-05 03:56:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:23,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:23,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:23,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,418 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-06-05 03:56:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:23,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654676983] [2021-06-05 03:56:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:23,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654676983] [2021-06-05 03:56:23,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654676983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975957198] [2021-06-05 03:56:23,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975957198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:23,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:23,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430237573] [2021-06-05 03:56:23,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:23,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:23,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:23,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:23,592 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:25,114 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-06-05 03:56:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:56:25,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:25,179 INFO L225 Difference]: With dead ends: 26773 [2021-06-05 03:56:25,179 INFO L226 Difference]: Without dead ends: 26767 [2021-06-05 03:56:25,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1017.5ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 03:56:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-06-05 03:56:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-06-05 03:56:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-06-05 03:56:25,837 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-06-05 03:56:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:25,837 INFO L482 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-06-05 03:56:25,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-06-05 03:56:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:25,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:25,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:26,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,077 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-06-05 03:56:26,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:26,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18951856] [2021-06-05 03:56:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18951856] [2021-06-05 03:56:26,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18951856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611127608] [2021-06-05 03:56:26,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:56:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611127608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:26,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:56:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147964144] [2021-06-05 03:56:26,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:26,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:26,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:26,451 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:27,122 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-06-05 03:56:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:56:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:27,192 INFO L225 Difference]: With dead ends: 34026 [2021-06-05 03:56:27,192 INFO L226 Difference]: Without dead ends: 33998 [2021-06-05 03:56:27,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:56:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-06-05 03:56:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-06-05 03:56:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-06-05 03:56:27,813 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-06-05 03:56:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:27,813 INFO L482 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-06-05 03:56:27,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-06-05 03:56:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:27,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:27,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:28,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:28,049 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-06-05 03:56:28,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:28,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344083980] [2021-06-05 03:56:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:28,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:28,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344083980] [2021-06-05 03:56:28,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344083980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770956369] [2021-06-05 03:56:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:28,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:28,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770956369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255880808] [2021-06-05 03:56:28,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:28,252 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:29,059 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-06-05 03:56:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:29,360 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-06-05 03:56:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:56:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:29,532 INFO L225 Difference]: With dead ends: 27117 [2021-06-05 03:56:29,532 INFO L226 Difference]: Without dead ends: 27075 [2021-06-05 03:56:29,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:56:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-06-05 03:56:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-06-05 03:56:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-06-05 03:56:30,027 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-06-05 03:56:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:30,027 INFO L482 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-06-05 03:56:30,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-06-05 03:56:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:30,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:30,065 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:30,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 03:56:30,265 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-06-05 03:56:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:30,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343080820] [2021-06-05 03:56:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:30,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343080820] [2021-06-05 03:56:30,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343080820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184026118] [2021-06-05 03:56:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184026118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:30,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:30,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661832329] [2021-06-05 03:56:30,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:30,480 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:31,758 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-06-05 03:56:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:56:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:31,820 INFO L225 Difference]: With dead ends: 28292 [2021-06-05 03:56:31,820 INFO L226 Difference]: Without dead ends: 28257 [2021-06-05 03:56:31,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:56:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-06-05 03:56:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-06-05 03:56:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-06-05 03:56:32,370 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-06-05 03:56:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:32,371 INFO L482 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-06-05 03:56:32,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-06-05 03:56:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:32,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:32,408 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:32,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 03:56:32,610 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-06-05 03:56:32,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:32,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639754418] [2021-06-05 03:56:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:32,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639754418] [2021-06-05 03:56:32,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639754418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:32,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74272510] [2021-06-05 03:56:32,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:32,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:32,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:32,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74272510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:32,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:32,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:32,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890386427] [2021-06-05 03:56:32,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:32,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:32,788 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:34,327 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-06-05 03:56:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:56:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:34,391 INFO L225 Difference]: With dead ends: 28749 [2021-06-05 03:56:34,391 INFO L226 Difference]: Without dead ends: 28749 [2021-06-05 03:56:34,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:56:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-06-05 03:56:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-06-05 03:56:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-06-05 03:56:34,966 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-06-05 03:56:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:34,966 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-06-05 03:56:34,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-06-05 03:56:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:35,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:35,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:35,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 03:56:35,210 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:35,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-06-05 03:56:35,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:35,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120685520] [2021-06-05 03:56:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:35,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:35,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120685520] [2021-06-05 03:56:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120685520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600221227] [2021-06-05 03:56:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:35,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600221227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:35,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:56:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248942760] [2021-06-05 03:56:35,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:35,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:35,440 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:37,042 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-06-05 03:56:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:56:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:37,108 INFO L225 Difference]: With dead ends: 29221 [2021-06-05 03:56:37,108 INFO L226 Difference]: Without dead ends: 29217 [2021-06-05 03:56:37,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:56:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-06-05 03:56:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-06-05 03:56:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-06-05 03:56:37,630 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-06-05 03:56:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:37,630 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-06-05 03:56:37,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-06-05 03:56:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:37,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:37,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:37,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 03:56:37,872 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:37,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-06-05 03:56:37,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:37,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615150848] [2021-06-05 03:56:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:37,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:37,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615150848] [2021-06-05 03:56:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615150848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:37,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948928044] [2021-06-05 03:56:37,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:37,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:37,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:37,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948928044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:38,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:38,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:56:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355152439] [2021-06-05 03:56:38,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:38,095 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:39,726 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-06-05 03:56:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:56:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:39,786 INFO L225 Difference]: With dead ends: 29744 [2021-06-05 03:56:39,787 INFO L226 Difference]: Without dead ends: 29744 [2021-06-05 03:56:39,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:56:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-06-05 03:56:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-06-05 03:56:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-06-05 03:56:40,278 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-06-05 03:56:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:40,278 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-06-05 03:56:40,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-06-05 03:56:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:40,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:40,312 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:40,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 03:56:40,512 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-06-05 03:56:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:40,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524682769] [2021-06-05 03:56:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:40,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:40,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524682769] [2021-06-05 03:56:40,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524682769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:40,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777281754] [2021-06-05 03:56:40,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:40,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:56:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:40,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777281754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:40,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:40,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:40,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747144159] [2021-06-05 03:56:40,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:40,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:40,693 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:41,595 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-06-05 03:56:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:56:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:41,652 INFO L225 Difference]: With dead ends: 27264 [2021-06-05 03:56:41,652 INFO L226 Difference]: Without dead ends: 27186 [2021-06-05 03:56:41,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:56:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-06-05 03:56:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-06-05 03:56:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-06-05 03:56:42,250 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-06-05 03:56:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:42,250 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-06-05 03:56:42,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-06-05 03:56:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:42,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:42,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:42,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:42,486 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-06-05 03:56:42,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:42,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209043883] [2021-06-05 03:56:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:42,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209043883] [2021-06-05 03:56:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209043883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273970575] [2021-06-05 03:56:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:42,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:56:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:42,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:42,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273970575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:42,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:42,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222300843] [2021-06-05 03:56:42,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:42,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:42,692 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,881 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-06-05 03:56:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:43,610 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-06-05 03:56:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:56:43,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:43,667 INFO L225 Difference]: With dead ends: 27092 [2021-06-05 03:56:43,668 INFO L226 Difference]: Without dead ends: 27014 [2021-06-05 03:56:43,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 694.5ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:56:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-06-05 03:56:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-06-05 03:56:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-06-05 03:56:44,198 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-06-05 03:56:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:44,198 INFO L482 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-06-05 03:56:44,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-06-05 03:56:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:44,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:44,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:44,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 03:56:44,433 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-06-05 03:56:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:44,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377973885] [2021-06-05 03:56:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:44,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:44,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377973885] [2021-06-05 03:56:44,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377973885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371791403] [2021-06-05 03:56:44,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:44,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371791403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:44,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:44,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213545819] [2021-06-05 03:56:44,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:44,760 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:45,852 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-06-05 03:56:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:56:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:45,911 INFO L225 Difference]: With dead ends: 29237 [2021-06-05 03:56:45,911 INFO L226 Difference]: Without dead ends: 29132 [2021-06-05 03:56:45,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:56:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-06-05 03:56:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-06-05 03:56:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-06-05 03:56:46,631 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-06-05 03:56:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:46,631 INFO L482 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-06-05 03:56:46,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-06-05 03:56:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:46,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:46,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:46,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 03:56:46,867 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-06-05 03:56:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:46,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601690525] [2021-06-05 03:56:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:46,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:46,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601690525] [2021-06-05 03:56:46,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601690525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875923861] [2021-06-05 03:56:46,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:46,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:47,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875923861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:47,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:47,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:47,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285289849] [2021-06-05 03:56:47,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:47,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:47,043 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:48,331 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-06-05 03:56:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:56:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:48,395 INFO L225 Difference]: With dead ends: 30260 [2021-06-05 03:56:48,395 INFO L226 Difference]: Without dead ends: 30225 [2021-06-05 03:56:48,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 836.4ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:56:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-06-05 03:56:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-06-05 03:56:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-06-05 03:56:49,028 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-06-05 03:56:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:49,028 INFO L482 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-06-05 03:56:49,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-06-05 03:56:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:49,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:49,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:49,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:49,268 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-06-05 03:56:49,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:49,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544261671] [2021-06-05 03:56:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:49,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544261671] [2021-06-05 03:56:49,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544261671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740483618] [2021-06-05 03:56:49,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:49,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:56:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:49,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740483618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:49,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:49,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435533152] [2021-06-05 03:56:49,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:49,443 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:50,979 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-06-05 03:56:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:56:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:51,046 INFO L225 Difference]: With dead ends: 30555 [2021-06-05 03:56:51,046 INFO L226 Difference]: Without dead ends: 30555 [2021-06-05 03:56:51,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 03:56:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-06-05 03:56:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-06-05 03:56:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-06-05 03:56:51,708 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-06-05 03:56:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-06-05 03:56:51,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-06-05 03:56:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:51,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:51,745 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:51,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:51,945 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-06-05 03:56:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:51,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907884132] [2021-06-05 03:56:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:51,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907884132] [2021-06-05 03:56:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907884132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5241554] [2021-06-05 03:56:51,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:52,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:52,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5241554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:52,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:52,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:52,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903390438] [2021-06-05 03:56:52,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:52,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:52,121 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:53,206 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-06-05 03:56:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:56:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:53,266 INFO L225 Difference]: With dead ends: 29274 [2021-06-05 03:56:53,267 INFO L226 Difference]: Without dead ends: 29190 [2021-06-05 03:56:53,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:56:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-06-05 03:56:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-06-05 03:56:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-06-05 03:56:53,910 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-06-05 03:56:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:53,910 INFO L482 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-06-05 03:56:53,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-06-05 03:56:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:53,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:53,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:54,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:54,158 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:54,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-06-05 03:56:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397459795] [2021-06-05 03:56:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:54,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:54,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397459795] [2021-06-05 03:56:54,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397459795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:54,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969722744] [2021-06-05 03:56:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:54,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:54,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969722744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:54,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:54,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983287484] [2021-06-05 03:56:54,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:54,331 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:55,626 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-06-05 03:56:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:56:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:55,694 INFO L225 Difference]: With dead ends: 30288 [2021-06-05 03:56:55,694 INFO L226 Difference]: Without dead ends: 30239 [2021-06-05 03:56:55,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:56:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-06-05 03:56:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-06-05 03:56:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-06-05 03:56:56,507 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-06-05 03:56:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:56,507 INFO L482 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-06-05 03:56:56,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-06-05 03:56:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:56,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:56,551 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:56,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:56,751 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-06-05 03:56:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:56,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696012886] [2021-06-05 03:56:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:56,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696012886] [2021-06-05 03:56:56,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696012886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010580201] [2021-06-05 03:56:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:56,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:56:56,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:56,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010580201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:56,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:56,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222337057] [2021-06-05 03:56:56,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:56,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:56,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:56,921 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:58,417 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-06-05 03:56:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:56:58,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:56:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:58,483 INFO L225 Difference]: With dead ends: 30750 [2021-06-05 03:56:58,483 INFO L226 Difference]: Without dead ends: 30750 [2021-06-05 03:56:58,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 913.0ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:56:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-06-05 03:56:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-06-05 03:56:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-06-05 03:56:59,170 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-06-05 03:56:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:59,170 INFO L482 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-06-05 03:56:59,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-06-05 03:56:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:56:59,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:59,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:59,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 03:56:59,418 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:59,419 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-06-05 03:56:59,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:59,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909132265] [2021-06-05 03:56:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:59,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:59,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909132265] [2021-06-05 03:56:59,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909132265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:59,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268292120] [2021-06-05 03:56:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:56:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:59,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268292120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:59,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:59,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:56:59,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410231065] [2021-06-05 03:56:59,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:59,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:59,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:59,617 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:00,929 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-06-05 03:57:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 03:57:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:01,131 INFO L225 Difference]: With dead ends: 29361 [2021-06-05 03:57:01,132 INFO L226 Difference]: Without dead ends: 29361 [2021-06-05 03:57:01,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:57:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-06-05 03:57:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-06-05 03:57:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-06-05 03:57:01,716 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-06-05 03:57:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:01,717 INFO L482 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-06-05 03:57:01,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-06-05 03:57:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:01,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:01,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:01,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 03:57:01,964 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-06-05 03:57:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:01,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105603042] [2021-06-05 03:57:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:02,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:02,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105603042] [2021-06-05 03:57:02,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105603042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:02,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972593395] [2021-06-05 03:57:02,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:02,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:02,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972593395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:02,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:02,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601728039] [2021-06-05 03:57:02,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:02,160 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:02,289 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-06-05 03:57:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:03,327 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-06-05 03:57:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:57:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:03,393 INFO L225 Difference]: With dead ends: 28982 [2021-06-05 03:57:03,394 INFO L226 Difference]: Without dead ends: 28947 [2021-06-05 03:57:03,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:57:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-06-05 03:57:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-06-05 03:57:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-06-05 03:57:04,009 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-06-05 03:57:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:04,009 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-06-05 03:57:04,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-06-05 03:57:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:04,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:04,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:04,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 03:57:04,251 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-06-05 03:57:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:04,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165554345] [2021-06-05 03:57:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165554345] [2021-06-05 03:57:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165554345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808054638] [2021-06-05 03:57:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:04,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:57:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808054638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:04,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23471003] [2021-06-05 03:57:04,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:04,426 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:06,012 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-06-05 03:57:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:57:06,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:06,088 INFO L225 Difference]: With dead ends: 33306 [2021-06-05 03:57:06,088 INFO L226 Difference]: Without dead ends: 33306 [2021-06-05 03:57:06,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:57:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-06-05 03:57:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-06-05 03:57:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-06-05 03:57:06,816 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-06-05 03:57:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:06,816 INFO L482 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-06-05 03:57:06,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-06-05 03:57:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:06,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:06,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:07,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 03:57:07,064 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-06-05 03:57:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266952714] [2021-06-05 03:57:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:07,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:07,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266952714] [2021-06-05 03:57:07,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266952714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:07,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340210184] [2021-06-05 03:57:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:07,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:07,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:07,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340210184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:07,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:07,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:07,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023813295] [2021-06-05 03:57:07,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:07,250 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:08,444 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-06-05 03:57:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:08,813 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-06-05 03:57:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:57:08,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:08,883 INFO L225 Difference]: With dead ends: 33343 [2021-06-05 03:57:08,883 INFO L226 Difference]: Without dead ends: 33343 [2021-06-05 03:57:08,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 03:57:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-06-05 03:57:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-06-05 03:57:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-06-05 03:57:09,584 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-06-05 03:57:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:09,585 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-06-05 03:57:09,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-06-05 03:57:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:09,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:09,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:09,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 03:57:09,827 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:09,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-06-05 03:57:09,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:09,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656020744] [2021-06-05 03:57:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:09,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:09,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656020744] [2021-06-05 03:57:09,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656020744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:09,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972769806] [2021-06-05 03:57:09,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:09,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:09,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:09,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972769806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:09,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:09,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:09,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874663191] [2021-06-05 03:57:09,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:09,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:09,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:09,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:09,998 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:10,999 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-06-05 03:57:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:57:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:11,063 INFO L225 Difference]: With dead ends: 29062 [2021-06-05 03:57:11,063 INFO L226 Difference]: Without dead ends: 29027 [2021-06-05 03:57:11,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:57:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-06-05 03:57:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-06-05 03:57:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-06-05 03:57:11,702 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-06-05 03:57:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:11,702 INFO L482 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-06-05 03:57:11,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-06-05 03:57:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:11,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:11,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:11,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 03:57:11,944 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-06-05 03:57:11,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:11,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534404398] [2021-06-05 03:57:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:11,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534404398] [2021-06-05 03:57:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534404398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860904514] [2021-06-05 03:57:11,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:12,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:57:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:12,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860904514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020566514] [2021-06-05 03:57:12,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:12,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:12,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:12,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:12,143 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:13,694 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-06-05 03:57:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:57:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:13,760 INFO L225 Difference]: With dead ends: 29427 [2021-06-05 03:57:13,760 INFO L226 Difference]: Without dead ends: 29427 [2021-06-05 03:57:13,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:57:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-06-05 03:57:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-06-05 03:57:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-06-05 03:57:14,352 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-06-05 03:57:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:14,352 INFO L482 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-06-05 03:57:14,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-06-05 03:57:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:14,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:14,393 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:14,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:14,597 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-06-05 03:57:14,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:14,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264895329] [2021-06-05 03:57:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:14,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:14,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264895329] [2021-06-05 03:57:14,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264895329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:14,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563264846] [2021-06-05 03:57:14,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:14,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:57:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:14,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563264846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:14,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:14,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 03:57:14,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355778329] [2021-06-05 03:57:14,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:57:14,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:57:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:57:14,748 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:15,151 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-06-05 03:57:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:57:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:15,224 INFO L225 Difference]: With dead ends: 35828 [2021-06-05 03:57:15,224 INFO L226 Difference]: Without dead ends: 35821 [2021-06-05 03:57:15,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:57:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-06-05 03:57:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-06-05 03:57:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-06-05 03:57:15,928 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-06-05 03:57:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:15,928 INFO L482 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-06-05 03:57:15,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-06-05 03:57:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:15,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:15,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:16,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:16,164 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-06-05 03:57:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924432628] [2021-06-05 03:57:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:16,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924432628] [2021-06-05 03:57:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924432628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339283186] [2021-06-05 03:57:16,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:16,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:57:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:57:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339283186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:16,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:16,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:57:16,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573605503] [2021-06-05 03:57:16,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:16,281 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:16,846 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-06-05 03:57:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:57:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:16,945 INFO L225 Difference]: With dead ends: 44652 [2021-06-05 03:57:16,945 INFO L226 Difference]: Without dead ends: 44652 [2021-06-05 03:57:16,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-06-05 03:57:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-06-05 03:57:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-06-05 03:57:17,889 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-06-05 03:57:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:17,889 INFO L482 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-06-05 03:57:17,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-06-05 03:57:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:17,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:17,948 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:18,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:18,149 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-06-05 03:57:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:18,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978806772] [2021-06-05 03:57:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:18,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:18,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978806772] [2021-06-05 03:57:18,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978806772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:18,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259061616] [2021-06-05 03:57:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:18,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259061616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:18,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:18,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:18,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347052300] [2021-06-05 03:57:18,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:18,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:18,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:18,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:18,359 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:19,048 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-06-05 03:57:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:57:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:19,124 INFO L225 Difference]: With dead ends: 33629 [2021-06-05 03:57:19,124 INFO L226 Difference]: Without dead ends: 33615 [2021-06-05 03:57:19,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:57:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-06-05 03:57:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-06-05 03:57:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-06-05 03:57:19,972 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-06-05 03:57:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:19,972 INFO L482 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-06-05 03:57:19,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-06-05 03:57:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:20,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:20,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:20,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:20,225 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-06-05 03:57:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:20,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261823099] [2021-06-05 03:57:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:20,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261823099] [2021-06-05 03:57:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261823099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46282590] [2021-06-05 03:57:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:20,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:20,632 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 03:57:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46282590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:20,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:20,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:20,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42737278] [2021-06-05 03:57:20,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:20,666 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:21,398 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-06-05 03:57:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:57:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:21,471 INFO L225 Difference]: With dead ends: 33760 [2021-06-05 03:57:21,471 INFO L226 Difference]: Without dead ends: 33754 [2021-06-05 03:57:21,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:57:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-06-05 03:57:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-06-05 03:57:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-06-05 03:57:22,221 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-06-05 03:57:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:22,221 INFO L482 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-06-05 03:57:22,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-06-05 03:57:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:22,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:22,274 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:22,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:22,474 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-06-05 03:57:22,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:22,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236419936] [2021-06-05 03:57:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:22,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:22,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236419936] [2021-06-05 03:57:22,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236419936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:22,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090676683] [2021-06-05 03:57:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:22,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:57:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:57:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:22,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090676683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:22,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:22,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 03:57:22,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018063901] [2021-06-05 03:57:22,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:57:22,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:57:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:57:22,595 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 03:57:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:22,897 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-06-05 03:57:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:57:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:22,989 INFO L225 Difference]: With dead ends: 41266 [2021-06-05 03:57:22,989 INFO L226 Difference]: Without dead ends: 41260 [2021-06-05 03:57:22,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:57:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-06-05 03:57:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-06-05 03:57:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-06-05 03:57:24,062 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-06-05 03:57:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:24,063 INFO L482 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-06-05 03:57:24,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 03:57:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-06-05 03:57:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:24,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:24,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:24,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 03:57:24,322 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:24,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-06-05 03:57:24,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:24,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145636855] [2021-06-05 03:57:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:24,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:24,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145636855] [2021-06-05 03:57:24,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145636855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864973230] [2021-06-05 03:57:24,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:24,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:24,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:24,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:57:24,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:24,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864973230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:24,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 03:57:24,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222331234] [2021-06-05 03:57:24,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:24,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:24,668 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:24,993 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-06-05 03:57:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:57:24,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:25,082 INFO L225 Difference]: With dead ends: 41324 [2021-06-05 03:57:25,082 INFO L226 Difference]: Without dead ends: 41306 [2021-06-05 03:57:25,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-06-05 03:57:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-06-05 03:57:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-06-05 03:57:25,929 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-06-05 03:57:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:25,929 INFO L482 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-06-05 03:57:25,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-06-05 03:57:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:25,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:25,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:26,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 03:57:26,183 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-06-05 03:57:26,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:26,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116101531] [2021-06-05 03:57:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:26,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:26,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116101531] [2021-06-05 03:57:26,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116101531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:26,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500444457] [2021-06-05 03:57:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:26,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:26,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:57:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:26,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500444457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:26,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:26,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 03:57:26,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989859340] [2021-06-05 03:57:26,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:57:26,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:57:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:57:26,303 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:26,645 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-06-05 03:57:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:57:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:26,736 INFO L225 Difference]: With dead ends: 41161 [2021-06-05 03:57:26,736 INFO L226 Difference]: Without dead ends: 41131 [2021-06-05 03:57:26,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-06-05 03:57:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-06-05 03:57:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-06-05 03:57:27,634 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-06-05 03:57:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:27,634 INFO L482 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-06-05 03:57:27,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-06-05 03:57:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:27,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:27,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:27,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 03:57:27,888 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-06-05 03:57:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:27,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59508014] [2021-06-05 03:57:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:27,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:27,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59508014] [2021-06-05 03:57:27,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59508014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:27,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893895266] [2021-06-05 03:57:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:28,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893895266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:28,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:28,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:28,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620396821] [2021-06-05 03:57:28,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:28,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:28,043 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,433 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-06-05 03:57:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:30,159 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-06-05 03:57:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:57:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:30,337 INFO L225 Difference]: With dead ends: 66239 [2021-06-05 03:57:30,337 INFO L226 Difference]: Without dead ends: 66187 [2021-06-05 03:57:30,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1376.2ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 03:57:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-06-05 03:57:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-06-05 03:57:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-06-05 03:57:31,646 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-06-05 03:57:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:31,647 INFO L482 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-06-05 03:57:31,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-06-05 03:57:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:31,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:31,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:31,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 03:57:31,905 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-06-05 03:57:31,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:31,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342033796] [2021-06-05 03:57:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:31,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342033796] [2021-06-05 03:57:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342033796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554949917] [2021-06-05 03:57:31,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:31,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:31,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554949917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:32,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:32,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:32,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166322302] [2021-06-05 03:57:32,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:32,059 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:34,167 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-06-05 03:57:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:57:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:34,365 INFO L225 Difference]: With dead ends: 74432 [2021-06-05 03:57:34,365 INFO L226 Difference]: Without dead ends: 74390 [2021-06-05 03:57:34,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:57:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states. [2021-06-05 03:57:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74390 to 35919. [2021-06-05 03:57:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35919 states, 35918 states have (on average 3.9112422740687123) internal successors, (140484), 35918 states have internal predecessors, (140484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35919 states to 35919 states and 140484 transitions. [2021-06-05 03:57:35,705 INFO L78 Accepts]: Start accepts. Automaton has 35919 states and 140484 transitions. Word has length 25 [2021-06-05 03:57:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:35,705 INFO L482 AbstractCegarLoop]: Abstraction has 35919 states and 140484 transitions. [2021-06-05 03:57:35,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35919 states and 140484 transitions. [2021-06-05 03:57:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:35,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:35,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:35,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:35,967 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 81 times [2021-06-05 03:57:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:35,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638558349] [2021-06-05 03:57:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:36,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638558349] [2021-06-05 03:57:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638558349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776353641] [2021-06-05 03:57:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:57:36,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776353641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:36,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706847999] [2021-06-05 03:57:36,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:36,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:36,137 INFO L87 Difference]: Start difference. First operand 35919 states and 140484 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:37,827 INFO L93 Difference]: Finished difference Result 61858 states and 228818 transitions. [2021-06-05 03:57:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:57:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:37,984 INFO L225 Difference]: With dead ends: 61858 [2021-06-05 03:57:37,984 INFO L226 Difference]: Without dead ends: 61830 [2021-06-05 03:57:37,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1124.8ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:57:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61830 states. [2021-06-05 03:57:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61830 to 38738. [2021-06-05 03:57:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38738 states, 38737 states have (on average 3.9098794434261817) internal successors, (151457), 38737 states have internal predecessors, (151457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38738 states to 38738 states and 151457 transitions. [2021-06-05 03:57:39,084 INFO L78 Accepts]: Start accepts. Automaton has 38738 states and 151457 transitions. Word has length 25 [2021-06-05 03:57:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:39,084 INFO L482 AbstractCegarLoop]: Abstraction has 38738 states and 151457 transitions. [2021-06-05 03:57:39,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 38738 states and 151457 transitions. [2021-06-05 03:57:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:39,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:39,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:39,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:39,355 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:39,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 82 times [2021-06-05 03:57:39,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:39,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714277404] [2021-06-05 03:57:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:39,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714277404] [2021-06-05 03:57:39,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714277404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394241021] [2021-06-05 03:57:39,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:39,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:39,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394241021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:39,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:39,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117866626] [2021-06-05 03:57:39,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:39,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:39,519 INFO L87 Difference]: Start difference. First operand 38738 states and 151457 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:41,386 INFO L93 Difference]: Finished difference Result 77268 states and 287634 transitions. [2021-06-05 03:57:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:57:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:41,582 INFO L225 Difference]: With dead ends: 77268 [2021-06-05 03:57:41,582 INFO L226 Difference]: Without dead ends: 77240 [2021-06-05 03:57:41,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 03:57:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77240 states. [2021-06-05 03:57:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77240 to 45925. [2021-06-05 03:57:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45925 states, 45924 states have (on average 3.9262477136137965) internal successors, (180309), 45924 states have internal predecessors, (180309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45925 states to 45925 states and 180309 transitions. [2021-06-05 03:57:43,314 INFO L78 Accepts]: Start accepts. Automaton has 45925 states and 180309 transitions. Word has length 25 [2021-06-05 03:57:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 45925 states and 180309 transitions. [2021-06-05 03:57:43,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45925 states and 180309 transitions. [2021-06-05 03:57:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:43,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:43,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:43,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 03:57:43,588 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 83 times [2021-06-05 03:57:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:43,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870231334] [2021-06-05 03:57:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:43,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870231334] [2021-06-05 03:57:43,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870231334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930474505] [2021-06-05 03:57:43,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:43,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:43,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930474505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:43,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:43,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:43,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077057866] [2021-06-05 03:57:43,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:43,746 INFO L87 Difference]: Start difference. First operand 45925 states and 180309 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:45,081 INFO L93 Difference]: Finished difference Result 66048 states and 249082 transitions. [2021-06-05 03:57:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:57:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:45,532 INFO L225 Difference]: With dead ends: 66048 [2021-06-05 03:57:45,532 INFO L226 Difference]: Without dead ends: 65996 [2021-06-05 03:57:45,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:57:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65996 states. [2021-06-05 03:57:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65996 to 40933. [2021-06-05 03:57:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 3.9125378676829863) internal successors, (160148), 40932 states have internal predecessors, (160148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 160148 transitions. [2021-06-05 03:57:46,682 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 160148 transitions. Word has length 25 [2021-06-05 03:57:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:46,682 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 160148 transitions. [2021-06-05 03:57:46,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 160148 transitions. [2021-06-05 03:57:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:46,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:46,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:46,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:46,946 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:46,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 84 times [2021-06-05 03:57:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:46,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117155023] [2021-06-05 03:57:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:46,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:46,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117155023] [2021-06-05 03:57:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117155023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:46,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871918972] [2021-06-05 03:57:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:47,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:57:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:47,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871918972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:47,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:47,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:47,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209956766] [2021-06-05 03:57:47,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:47,107 INFO L87 Difference]: Start difference. First operand 40933 states and 160148 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:48,813 INFO L93 Difference]: Finished difference Result 67539 states and 253876 transitions. [2021-06-05 03:57:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:57:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:49,006 INFO L225 Difference]: With dead ends: 67539 [2021-06-05 03:57:49,006 INFO L226 Difference]: Without dead ends: 67515 [2021-06-05 03:57:49,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 840.9ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 03:57:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-06-05 03:57:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42889. [2021-06-05 03:57:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42888 states have (on average 3.9317524715538146) internal successors, (168625), 42888 states have internal predecessors, (168625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 168625 transitions. [2021-06-05 03:57:50,273 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 168625 transitions. Word has length 25 [2021-06-05 03:57:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:50,273 INFO L482 AbstractCegarLoop]: Abstraction has 42889 states and 168625 transitions. [2021-06-05 03:57:50,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 168625 transitions. [2021-06-05 03:57:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:50,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:50,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:50,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:50,541 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 85 times [2021-06-05 03:57:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:50,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600530191] [2021-06-05 03:57:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:50,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600530191] [2021-06-05 03:57:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600530191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629188775] [2021-06-05 03:57:50,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:57:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629188775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:50,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:50,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:57:50,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473820756] [2021-06-05 03:57:50,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:57:50,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:57:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:57:50,717 INFO L87 Difference]: Start difference. First operand 42889 states and 168625 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:52,262 INFO L93 Difference]: Finished difference Result 73498 states and 274895 transitions. [2021-06-05 03:57:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:57:52,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:52,463 INFO L225 Difference]: With dead ends: 73498 [2021-06-05 03:57:52,463 INFO L226 Difference]: Without dead ends: 73498 [2021-06-05 03:57:52,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:57:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73498 states. [2021-06-05 03:57:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73498 to 42843. [2021-06-05 03:57:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42843 states, 42842 states have (on average 3.928574763082956) internal successors, (168308), 42842 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42843 states to 42843 states and 168308 transitions. [2021-06-05 03:57:53,761 INFO L78 Accepts]: Start accepts. Automaton has 42843 states and 168308 transitions. Word has length 25 [2021-06-05 03:57:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 42843 states and 168308 transitions. [2021-06-05 03:57:53,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42843 states and 168308 transitions. [2021-06-05 03:57:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:53,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:53,828 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:54,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:54,028 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 54 times [2021-06-05 03:57:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:54,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489657647] [2021-06-05 03:57:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:54,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489657647] [2021-06-05 03:57:54,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489657647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611344562] [2021-06-05 03:57:54,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:54,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:57:54,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:54,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611344562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:54,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:54,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:54,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206841049] [2021-06-05 03:57:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:54,211 INFO L87 Difference]: Start difference. First operand 42843 states and 168308 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:54,968 INFO L93 Difference]: Finished difference Result 48257 states and 184838 transitions. [2021-06-05 03:57:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:57:54,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:55,080 INFO L225 Difference]: With dead ends: 48257 [2021-06-05 03:57:55,080 INFO L226 Difference]: Without dead ends: 48257 [2021-06-05 03:57:55,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:57:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48257 states. [2021-06-05 03:57:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48257 to 42793. [2021-06-05 03:57:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42793 states, 42792 states have (on average 3.928608151056272) internal successors, (168113), 42792 states have internal predecessors, (168113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42793 states to 42793 states and 168113 transitions. [2021-06-05 03:57:56,360 INFO L78 Accepts]: Start accepts. Automaton has 42793 states and 168113 transitions. Word has length 25 [2021-06-05 03:57:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:56,360 INFO L482 AbstractCegarLoop]: Abstraction has 42793 states and 168113 transitions. [2021-06-05 03:57:56,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 42793 states and 168113 transitions. [2021-06-05 03:57:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:56,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:56,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:56,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 03:57:56,630 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 55 times [2021-06-05 03:57:56,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:56,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639493938] [2021-06-05 03:57:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:56,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639493938] [2021-06-05 03:57:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639493938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442658740] [2021-06-05 03:57:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:56,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442658740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:56,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:56,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:56,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992773151] [2021-06-05 03:57:56,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:56,843 INFO L87 Difference]: Start difference. First operand 42793 states and 168113 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:58,054 INFO L93 Difference]: Finished difference Result 44296 states and 172371 transitions. [2021-06-05 03:57:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:57:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:58,158 INFO L225 Difference]: With dead ends: 44296 [2021-06-05 03:57:58,159 INFO L226 Difference]: Without dead ends: 44282 [2021-06-05 03:57:58,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 414.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:57:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-06-05 03:57:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 43170. [2021-06-05 03:57:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 43169 states have (on average 3.922814982973893) internal successors, (169344), 43169 states have internal predecessors, (169344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 169344 transitions. [2021-06-05 03:57:59,141 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 169344 transitions. Word has length 25 [2021-06-05 03:57:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:59,141 INFO L482 AbstractCegarLoop]: Abstraction has 43170 states and 169344 transitions. [2021-06-05 03:57:59,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 169344 transitions. [2021-06-05 03:57:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:59,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:59,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:59,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 03:57:59,415 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 56 times [2021-06-05 03:57:59,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:59,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509606006] [2021-06-05 03:57:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:59,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:59,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509606006] [2021-06-05 03:57:59,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509606006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:59,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49786570] [2021-06-05 03:57:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:59,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:59,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:57:59,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:59,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49786570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:59,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:59,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:57:59,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662315982] [2021-06-05 03:57:59,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:59,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:59,589 INFO L87 Difference]: Start difference. First operand 43170 states and 169344 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:00,454 INFO L93 Difference]: Finished difference Result 44660 states and 173461 transitions. [2021-06-05 03:58:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:58:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:00,871 INFO L225 Difference]: With dead ends: 44660 [2021-06-05 03:58:00,871 INFO L226 Difference]: Without dead ends: 44654 [2021-06-05 03:58:00,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:58:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44654 states. [2021-06-05 03:58:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44654 to 42990. [2021-06-05 03:58:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.9254925678661983) internal successors, (168753), 42989 states have internal predecessors, (168753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168753 transitions. [2021-06-05 03:58:01,650 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168753 transitions. Word has length 25 [2021-06-05 03:58:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:01,650 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168753 transitions. [2021-06-05 03:58:01,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168753 transitions. [2021-06-05 03:58:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:02,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:02,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:02,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 03:58:02,270 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 86 times [2021-06-05 03:58:02,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:02,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667242675] [2021-06-05 03:58:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:02,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667242675] [2021-06-05 03:58:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667242675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325918738] [2021-06-05 03:58:02,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:02,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:02,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:02,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325918738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:02,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:02,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:02,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33610734] [2021-06-05 03:58:02,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:02,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:02,443 INFO L87 Difference]: Start difference. First operand 42990 states and 168753 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:03,761 INFO L93 Difference]: Finished difference Result 60797 states and 230049 transitions. [2021-06-05 03:58:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:58:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:03,914 INFO L225 Difference]: With dead ends: 60797 [2021-06-05 03:58:03,914 INFO L226 Difference]: Without dead ends: 60773 [2021-06-05 03:58:03,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:58:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60773 states. [2021-06-05 03:58:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60773 to 43024. [2021-06-05 03:58:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 3.925342258791809) internal successors, (168880), 43023 states have internal predecessors, (168880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 168880 transitions. [2021-06-05 03:58:05,125 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 168880 transitions. Word has length 25 [2021-06-05 03:58:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:05,125 INFO L482 AbstractCegarLoop]: Abstraction has 43024 states and 168880 transitions. [2021-06-05 03:58:05,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 168880 transitions. [2021-06-05 03:58:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:05,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:05,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:05,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 03:58:05,617 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 87 times [2021-06-05 03:58:05,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:05,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572793255] [2021-06-05 03:58:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:05,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:05,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572793255] [2021-06-05 03:58:05,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572793255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:05,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920642082] [2021-06-05 03:58:05,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:05,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:58:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:05,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:05,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920642082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:05,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:05,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:05,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945679634] [2021-06-05 03:58:05,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:05,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:05,775 INFO L87 Difference]: Start difference. First operand 43024 states and 168880 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:06,833 INFO L93 Difference]: Finished difference Result 59275 states and 225591 transitions. [2021-06-05 03:58:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:58:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:06,985 INFO L225 Difference]: With dead ends: 59275 [2021-06-05 03:58:06,986 INFO L226 Difference]: Without dead ends: 59251 [2021-06-05 03:58:06,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 03:58:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59251 states. [2021-06-05 03:58:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59251 to 42990. [2021-06-05 03:58:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.925469306101561) internal successors, (168752), 42989 states have internal predecessors, (168752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168752 transitions. [2021-06-05 03:58:08,138 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168752 transitions. Word has length 25 [2021-06-05 03:58:08,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:08,138 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168752 transitions. [2021-06-05 03:58:08,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168752 transitions. [2021-06-05 03:58:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:08,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:08,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:08,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 03:58:08,408 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 88 times [2021-06-05 03:58:08,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:08,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415985137] [2021-06-05 03:58:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:08,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415985137] [2021-06-05 03:58:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415985137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309779223] [2021-06-05 03:58:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:08,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:08,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:08,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309779223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:08,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:08,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:08,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912241940] [2021-06-05 03:58:08,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:08,564 INFO L87 Difference]: Start difference. First operand 42990 states and 168752 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,980 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 03:58:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:09,920 INFO L93 Difference]: Finished difference Result 75858 states and 282972 transitions. [2021-06-05 03:58:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:58:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:10,111 INFO L225 Difference]: With dead ends: 75858 [2021-06-05 03:58:10,112 INFO L226 Difference]: Without dead ends: 75858 [2021-06-05 03:58:10,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 842.2ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:58:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75858 states. [2021-06-05 03:58:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75858 to 43007. [2021-06-05 03:58:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43007 states, 43006 states have (on average 3.9260103241408175) internal successors, (168842), 43006 states have internal predecessors, (168842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43007 states to 43007 states and 168842 transitions. [2021-06-05 03:58:11,436 INFO L78 Accepts]: Start accepts. Automaton has 43007 states and 168842 transitions. Word has length 25 [2021-06-05 03:58:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:11,436 INFO L482 AbstractCegarLoop]: Abstraction has 43007 states and 168842 transitions. [2021-06-05 03:58:11,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 43007 states and 168842 transitions. [2021-06-05 03:58:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:11,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:11,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:11,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 03:58:11,702 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 89 times [2021-06-05 03:58:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:11,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909652664] [2021-06-05 03:58:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:11,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909652664] [2021-06-05 03:58:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909652664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465199931] [2021-06-05 03:58:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:11,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465199931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:11,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:11,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97812103] [2021-06-05 03:58:11,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:11,864 INFO L87 Difference]: Start difference. First operand 43007 states and 168842 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:13,289 INFO L93 Difference]: Finished difference Result 70213 states and 263905 transitions. [2021-06-05 03:58:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:58:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:13,465 INFO L225 Difference]: With dead ends: 70213 [2021-06-05 03:58:13,466 INFO L226 Difference]: Without dead ends: 70191 [2021-06-05 03:58:13,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:58:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70191 states. [2021-06-05 03:58:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70191 to 42956. [2021-06-05 03:58:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42956 states, 42955 states have (on average 3.924967989756722) internal successors, (168597), 42955 states have internal predecessors, (168597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42956 states to 42956 states and 168597 transitions. [2021-06-05 03:58:14,740 INFO L78 Accepts]: Start accepts. Automaton has 42956 states and 168597 transitions. Word has length 25 [2021-06-05 03:58:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:14,740 INFO L482 AbstractCegarLoop]: Abstraction has 42956 states and 168597 transitions. [2021-06-05 03:58:14,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 42956 states and 168597 transitions. [2021-06-05 03:58:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:14,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:14,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:15,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:15,007 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 90 times [2021-06-05 03:58:15,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:15,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59437720] [2021-06-05 03:58:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:15,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59437720] [2021-06-05 03:58:15,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59437720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469805647] [2021-06-05 03:58:15,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:15,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:58:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:15,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469805647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:15,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157654400] [2021-06-05 03:58:15,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:15,193 INFO L87 Difference]: Start difference. First operand 42956 states and 168597 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:15,728 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-06-05 03:58:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:16,299 INFO L93 Difference]: Finished difference Result 56698 states and 216274 transitions. [2021-06-05 03:58:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:58:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:16,456 INFO L225 Difference]: With dead ends: 56698 [2021-06-05 03:58:16,456 INFO L226 Difference]: Without dead ends: 56674 [2021-06-05 03:58:16,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:58:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56674 states. [2021-06-05 03:58:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56674 to 42976. [2021-06-05 03:58:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 3.9249098312972657) internal successors, (168673), 42975 states have internal predecessors, (168673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 168673 transitions. [2021-06-05 03:58:17,652 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 168673 transitions. Word has length 25 [2021-06-05 03:58:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:17,652 INFO L482 AbstractCegarLoop]: Abstraction has 42976 states and 168673 transitions. [2021-06-05 03:58:17,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 168673 transitions. [2021-06-05 03:58:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:17,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:17,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:17,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:17,921 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:17,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 91 times [2021-06-05 03:58:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:17,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244357319] [2021-06-05 03:58:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:17,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:17,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244357319] [2021-06-05 03:58:17,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244357319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:17,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931266646] [2021-06-05 03:58:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:18,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931266646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:18,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:18,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:18,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012277401] [2021-06-05 03:58:18,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:18,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:18,088 INFO L87 Difference]: Start difference. First operand 42976 states and 168673 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:18,758 INFO L93 Difference]: Finished difference Result 55282 states and 212006 transitions. [2021-06-05 03:58:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:58:18,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:19,260 INFO L225 Difference]: With dead ends: 55282 [2021-06-05 03:58:19,272 INFO L226 Difference]: Without dead ends: 55258 [2021-06-05 03:58:19,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:58:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55258 states. [2021-06-05 03:58:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55258 to 42948. [2021-06-05 03:58:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42948 states, 42947 states have (on average 3.9250937201667173) internal successors, (168571), 42947 states have internal predecessors, (168571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42948 states to 42948 states and 168571 transitions. [2021-06-05 03:58:20,147 INFO L78 Accepts]: Start accepts. Automaton has 42948 states and 168571 transitions. Word has length 25 [2021-06-05 03:58:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:20,147 INFO L482 AbstractCegarLoop]: Abstraction has 42948 states and 168571 transitions. [2021-06-05 03:58:20,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 42948 states and 168571 transitions. [2021-06-05 03:58:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:20,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:20,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:20,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:20,853 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 92 times [2021-06-05 03:58:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:20,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800956933] [2021-06-05 03:58:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:20,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:20,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800956933] [2021-06-05 03:58:20,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800956933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:20,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122875238] [2021-06-05 03:58:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:20,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:21,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122875238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:21,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:21,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:21,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058855232] [2021-06-05 03:58:21,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:21,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:21,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:21,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:21,066 INFO L87 Difference]: Start difference. First operand 42948 states and 168571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:21,801 INFO L93 Difference]: Finished difference Result 55613 states and 213184 transitions. [2021-06-05 03:58:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:58:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:21,940 INFO L225 Difference]: With dead ends: 55613 [2021-06-05 03:58:21,940 INFO L226 Difference]: Without dead ends: 55585 [2021-06-05 03:58:21,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:58:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-06-05 03:58:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 42946. [2021-06-05 03:58:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 3.9251833740831295) internal successors, (168567), 42945 states have internal predecessors, (168567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 168567 transitions. [2021-06-05 03:58:23,098 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 168567 transitions. Word has length 25 [2021-06-05 03:58:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:23,098 INFO L482 AbstractCegarLoop]: Abstraction has 42946 states and 168567 transitions. [2021-06-05 03:58:23,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 168567 transitions. [2021-06-05 03:58:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:23,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:23,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:23,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:23,365 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 93 times [2021-06-05 03:58:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:23,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045730458] [2021-06-05 03:58:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045730458] [2021-06-05 03:58:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045730458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083969389] [2021-06-05 03:58:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:23,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:58:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:23,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083969389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:23,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:23,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:23,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11851946] [2021-06-05 03:58:23,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:23,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:23,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:23,540 INFO L87 Difference]: Start difference. First operand 42946 states and 168567 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,604 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 03:58:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:25,073 INFO L93 Difference]: Finished difference Result 74999 states and 282718 transitions. [2021-06-05 03:58:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:58:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:25,281 INFO L225 Difference]: With dead ends: 74999 [2021-06-05 03:58:25,281 INFO L226 Difference]: Without dead ends: 74999 [2021-06-05 03:58:25,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 996.6ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:58:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74999 states. [2021-06-05 03:58:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74999 to 42943. [2021-06-05 03:58:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42943 states, 42942 states have (on average 3.9248521261236085) internal successors, (168541), 42942 states have internal predecessors, (168541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42943 states to 42943 states and 168541 transitions. [2021-06-05 03:58:26,658 INFO L78 Accepts]: Start accepts. Automaton has 42943 states and 168541 transitions. Word has length 25 [2021-06-05 03:58:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:26,659 INFO L482 AbstractCegarLoop]: Abstraction has 42943 states and 168541 transitions. [2021-06-05 03:58:26,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 42943 states and 168541 transitions. [2021-06-05 03:58:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:26,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:26,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:26,933 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 94 times [2021-06-05 03:58:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:26,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275628501] [2021-06-05 03:58:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:26,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:26,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275628501] [2021-06-05 03:58:26,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275628501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:26,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643391088] [2021-06-05 03:58:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:27,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:27,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643391088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:27,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:27,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151859303] [2021-06-05 03:58:27,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:27,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:27,110 INFO L87 Difference]: Start difference. First operand 42943 states and 168541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:28,666 INFO L93 Difference]: Finished difference Result 72540 states and 274174 transitions. [2021-06-05 03:58:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:58:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:28,845 INFO L225 Difference]: With dead ends: 72540 [2021-06-05 03:58:28,845 INFO L226 Difference]: Without dead ends: 72522 [2021-06-05 03:58:28,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1079.1ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 03:58:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72522 states. [2021-06-05 03:58:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72522 to 42930. [2021-06-05 03:58:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42930 states, 42929 states have (on average 3.92459642665797) internal successors, (168479), 42929 states have internal predecessors, (168479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42930 states to 42930 states and 168479 transitions. [2021-06-05 03:58:30,127 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 168479 transitions. Word has length 25 [2021-06-05 03:58:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:30,127 INFO L482 AbstractCegarLoop]: Abstraction has 42930 states and 168479 transitions. [2021-06-05 03:58:30,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 168479 transitions. [2021-06-05 03:58:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:30,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:30,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:30,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:30,395 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 95 times [2021-06-05 03:58:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:30,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212513445] [2021-06-05 03:58:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:30,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212513445] [2021-06-05 03:58:30,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212513445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514208721] [2021-06-05 03:58:30,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:30,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:30,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514208721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:30,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:30,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:30,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935565618] [2021-06-05 03:58:30,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:30,559 INFO L87 Difference]: Start difference. First operand 42930 states and 168479 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:31,820 INFO L93 Difference]: Finished difference Result 59679 states and 226607 transitions. [2021-06-05 03:58:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:58:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:31,964 INFO L225 Difference]: With dead ends: 59679 [2021-06-05 03:58:31,964 INFO L226 Difference]: Without dead ends: 59653 [2021-06-05 03:58:31,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:58:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59653 states. [2021-06-05 03:58:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59653 to 42909. [2021-06-05 03:58:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 42908 states have (on average 3.9246993567633077) internal successors, (168401), 42908 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 168401 transitions. [2021-06-05 03:58:33,163 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 168401 transitions. Word has length 25 [2021-06-05 03:58:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:33,163 INFO L482 AbstractCegarLoop]: Abstraction has 42909 states and 168401 transitions. [2021-06-05 03:58:33,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 168401 transitions. [2021-06-05 03:58:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:33,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:33,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:33,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 03:58:33,431 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 96 times [2021-06-05 03:58:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:33,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936247626] [2021-06-05 03:58:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:33,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936247626] [2021-06-05 03:58:33,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936247626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364338045] [2021-06-05 03:58:33,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:33,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:58:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:33,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364338045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:33,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:58:33,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728578396] [2021-06-05 03:58:33,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:33,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:33,616 INFO L87 Difference]: Start difference. First operand 42909 states and 168401 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:35,280 INFO L93 Difference]: Finished difference Result 70768 states and 265935 transitions. [2021-06-05 03:58:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:58:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:35,456 INFO L225 Difference]: With dead ends: 70768 [2021-06-05 03:58:35,456 INFO L226 Difference]: Without dead ends: 70747 [2021-06-05 03:58:35,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:58:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2021-06-05 03:58:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 46142. [2021-06-05 03:58:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9316226349667325) internal successors, (181409), 46141 states have internal predecessors, (181409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181409 transitions. [2021-06-05 03:58:36,770 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181409 transitions. Word has length 25 [2021-06-05 03:58:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:36,770 INFO L482 AbstractCegarLoop]: Abstraction has 46142 states and 181409 transitions. [2021-06-05 03:58:36,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181409 transitions. [2021-06-05 03:58:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:36,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:36,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:37,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:37,046 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 97 times [2021-06-05 03:58:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:37,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922414884] [2021-06-05 03:58:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:37,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922414884] [2021-06-05 03:58:37,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922414884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967208350] [2021-06-05 03:58:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967208350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:37,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:37,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:58:37,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648759469] [2021-06-05 03:58:37,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:37,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:37,219 INFO L87 Difference]: Start difference. First operand 46142 states and 181409 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:38,863 INFO L93 Difference]: Finished difference Result 70061 states and 263721 transitions. [2021-06-05 03:58:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:58:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:39,037 INFO L225 Difference]: With dead ends: 70061 [2021-06-05 03:58:39,037 INFO L226 Difference]: Without dead ends: 70061 [2021-06-05 03:58:39,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:58:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70061 states. [2021-06-05 03:58:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70061 to 46133. [2021-06-05 03:58:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46132 states have (on average 3.931414202722622) internal successors, (181364), 46132 states have internal predecessors, (181364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 181364 transitions. [2021-06-05 03:58:40,324 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 181364 transitions. Word has length 25 [2021-06-05 03:58:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:40,324 INFO L482 AbstractCegarLoop]: Abstraction has 46133 states and 181364 transitions. [2021-06-05 03:58:40,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 181364 transitions. [2021-06-05 03:58:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:40,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:40,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:40,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 03:58:40,597 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 98 times [2021-06-05 03:58:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:40,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34745652] [2021-06-05 03:58:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:40,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34745652] [2021-06-05 03:58:40,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34745652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914782765] [2021-06-05 03:58:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:40,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:40,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:40,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914782765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:40,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:40,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:58:40,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419541401] [2021-06-05 03:58:40,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:40,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:40,764 INFO L87 Difference]: Start difference. First operand 46133 states and 181364 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:42,399 INFO L93 Difference]: Finished difference Result 66793 states and 252387 transitions. [2021-06-05 03:58:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:58:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:42,577 INFO L225 Difference]: With dead ends: 66793 [2021-06-05 03:58:42,578 INFO L226 Difference]: Without dead ends: 66779 [2021-06-05 03:58:42,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:58:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66779 states. [2021-06-05 03:58:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66779 to 46121. [2021-06-05 03:58:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46121 states, 46120 states have (on average 3.9313313096270597) internal successors, (181313), 46120 states have internal predecessors, (181313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46121 states to 46121 states and 181313 transitions. [2021-06-05 03:58:43,863 INFO L78 Accepts]: Start accepts. Automaton has 46121 states and 181313 transitions. Word has length 25 [2021-06-05 03:58:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:43,863 INFO L482 AbstractCegarLoop]: Abstraction has 46121 states and 181313 transitions. [2021-06-05 03:58:43,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 46121 states and 181313 transitions. [2021-06-05 03:58:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:43,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:43,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:44,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:44,134 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 99 times [2021-06-05 03:58:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:44,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394779496] [2021-06-05 03:58:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:44,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:44,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394779496] [2021-06-05 03:58:44,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394779496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:44,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423502311] [2021-06-05 03:58:44,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:44,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:58:44,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:58:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:44,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423502311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:44,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:44,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:58:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140542928] [2021-06-05 03:58:44,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:44,344 INFO L87 Difference]: Start difference. First operand 46121 states and 181313 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:45,379 INFO L93 Difference]: Finished difference Result 61745 states and 236680 transitions. [2021-06-05 03:58:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:58:45,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:45,882 INFO L225 Difference]: With dead ends: 61745 [2021-06-05 03:58:45,882 INFO L226 Difference]: Without dead ends: 61721 [2021-06-05 03:58:45,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 03:58:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-06-05 03:58:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 46081. [2021-06-05 03:58:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46081 states, 46080 states have (on average 3.931640625) internal successors, (181170), 46080 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46081 states to 46081 states and 181170 transitions. [2021-06-05 03:58:47,176 INFO L78 Accepts]: Start accepts. Automaton has 46081 states and 181170 transitions. Word has length 25 [2021-06-05 03:58:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:47,176 INFO L482 AbstractCegarLoop]: Abstraction has 46081 states and 181170 transitions. [2021-06-05 03:58:47,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46081 states and 181170 transitions. [2021-06-05 03:58:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:47,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:47,449 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 57 times [2021-06-05 03:58:47,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145131658] [2021-06-05 03:58:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145131658] [2021-06-05 03:58:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145131658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663142628] [2021-06-05 03:58:47,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:47,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:58:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:47,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:58:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663142628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:47,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:58:47,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099950951] [2021-06-05 03:58:47,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:47,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:47,634 INFO L87 Difference]: Start difference. First operand 46081 states and 181170 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,227 INFO L93 Difference]: Finished difference Result 47008 states and 183685 transitions. [2021-06-05 03:58:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:58:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,338 INFO L225 Difference]: With dead ends: 47008 [2021-06-05 03:58:48,338 INFO L226 Difference]: Without dead ends: 47001 [2021-06-05 03:58:48,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:58:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47001 states. [2021-06-05 03:58:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47001 to 46162. [2021-06-05 03:58:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 3.9308507181386885) internal successors, (181452), 46161 states have internal predecessors, (181452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 181452 transitions. [2021-06-05 03:58:49,414 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 181452 transitions. Word has length 25 [2021-06-05 03:58:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:49,414 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 181452 transitions. [2021-06-05 03:58:49,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 181452 transitions. [2021-06-05 03:58:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:49,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:49,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:49,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 03:58:49,686 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 58 times [2021-06-05 03:58:49,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:49,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244452730] [2021-06-05 03:58:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:49,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244452730] [2021-06-05 03:58:49,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244452730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645699492] [2021-06-05 03:58:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:58:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645699492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:49,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:58:49,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145874807] [2021-06-05 03:58:49,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:49,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:49,869 INFO L87 Difference]: Start difference. First operand 46162 states and 181452 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:50,827 INFO L93 Difference]: Finished difference Result 47173 states and 184209 transitions. [2021-06-05 03:58:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:58:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:50,929 INFO L225 Difference]: With dead ends: 47173 [2021-06-05 03:58:50,930 INFO L226 Difference]: Without dead ends: 47173 [2021-06-05 03:58:50,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:58:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47173 states. [2021-06-05 03:58:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47173 to 46027. [2021-06-05 03:58:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46027 states, 46026 states have (on average 3.932733672272194) internal successors, (181008), 46026 states have internal predecessors, (181008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 181008 transitions. [2021-06-05 03:58:52,137 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 181008 transitions. Word has length 25 [2021-06-05 03:58:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:52,137 INFO L482 AbstractCegarLoop]: Abstraction has 46027 states and 181008 transitions. [2021-06-05 03:58:52,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 181008 transitions. [2021-06-05 03:58:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:52,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:52,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:52,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,409 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 16 times [2021-06-05 03:58:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:52,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854806006] [2021-06-05 03:58:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:52,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854806006] [2021-06-05 03:58:52,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854806006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272545513] [2021-06-05 03:58:52,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:58:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272545513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:58:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802572464] [2021-06-05 03:58:52,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:52,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:52,591 INFO L87 Difference]: Start difference. First operand 46027 states and 181008 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:53,334 INFO L93 Difference]: Finished difference Result 46443 states and 182086 transitions. [2021-06-05 03:58:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:58:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:53,442 INFO L225 Difference]: With dead ends: 46443 [2021-06-05 03:58:53,442 INFO L226 Difference]: Without dead ends: 46443 [2021-06-05 03:58:53,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:58:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46443 states. [2021-06-05 03:58:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46443 to 46095. [2021-06-05 03:58:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.9314878292185536) internal successors, (181218), 46094 states have internal predecessors, (181218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 181218 transitions. [2021-06-05 03:58:54,512 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 181218 transitions. Word has length 25 [2021-06-05 03:58:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:54,512 INFO L482 AbstractCegarLoop]: Abstraction has 46095 states and 181218 transitions. [2021-06-05 03:58:54,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 181218 transitions. [2021-06-05 03:58:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:54,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:54,605 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:54,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,806 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 17 times [2021-06-05 03:58:54,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:54,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076779370] [2021-06-05 03:58:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:54,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:54,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076779370] [2021-06-05 03:58:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076779370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848969856] [2021-06-05 03:58:54,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:54,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:58:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848969856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:54,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:58:54,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762717991] [2021-06-05 03:58:54,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:58:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:58:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:54,911 INFO L87 Difference]: Start difference. First operand 46095 states and 181218 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:55,758 INFO L93 Difference]: Finished difference Result 73392 states and 283504 transitions. [2021-06-05 03:58:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:55,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:55,957 INFO L225 Difference]: With dead ends: 73392 [2021-06-05 03:58:55,957 INFO L226 Difference]: Without dead ends: 73366 [2021-06-05 03:58:55,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:58:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73366 states. [2021-06-05 03:58:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73366 to 61230. [2021-06-05 03:58:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61230 states, 61229 states have (on average 3.9815446928742917) internal successors, (243786), 61229 states have internal predecessors, (243786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61230 states to 61230 states and 243786 transitions. [2021-06-05 03:58:57,510 INFO L78 Accepts]: Start accepts. Automaton has 61230 states and 243786 transitions. Word has length 25 [2021-06-05 03:58:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:57,511 INFO L482 AbstractCegarLoop]: Abstraction has 61230 states and 243786 transitions. [2021-06-05 03:58:57,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 61230 states and 243786 transitions. [2021-06-05 03:58:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:57,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:57,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:57,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:57,816 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 18 times [2021-06-05 03:58:57,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:57,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243166522] [2021-06-05 03:58:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:57,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243166522] [2021-06-05 03:58:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243166522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042606528] [2021-06-05 03:58:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:57,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:58:57,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:58:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042606528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:57,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:58:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756557021] [2021-06-05 03:58:58,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:58,000 INFO L87 Difference]: Start difference. First operand 61230 states and 243786 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:59,218 INFO L93 Difference]: Finished difference Result 62484 states and 247025 transitions. [2021-06-05 03:58:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:58:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:59,447 INFO L225 Difference]: With dead ends: 62484 [2021-06-05 03:58:59,447 INFO L226 Difference]: Without dead ends: 62484 [2021-06-05 03:58:59,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:58:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62484 states. [2021-06-05 03:59:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62484 to 61380. [2021-06-05 03:59:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61380 states, 61379 states have (on average 3.9795858518385767) internal successors, (244263), 61379 states have internal predecessors, (244263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61380 states to 61380 states and 244263 transitions. [2021-06-05 03:59:00,921 INFO L78 Accepts]: Start accepts. Automaton has 61380 states and 244263 transitions. Word has length 25 [2021-06-05 03:59:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:00,921 INFO L482 AbstractCegarLoop]: Abstraction has 61380 states and 244263 transitions. [2021-06-05 03:59:00,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states and 244263 transitions. [2021-06-05 03:59:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:01,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:01,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:01,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,228 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 19 times [2021-06-05 03:59:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389504871] [2021-06-05 03:59:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389504871] [2021-06-05 03:59:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389504871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653175915] [2021-06-05 03:59:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:01,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653175915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:01,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:59:01,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079031813] [2021-06-05 03:59:01,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:59:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:59:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:59:01,338 INFO L87 Difference]: Start difference. First operand 61380 states and 244263 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:01,863 INFO L93 Difference]: Finished difference Result 82749 states and 315087 transitions. [2021-06-05 03:59:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:59:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:02,531 INFO L225 Difference]: With dead ends: 82749 [2021-06-05 03:59:02,531 INFO L226 Difference]: Without dead ends: 82749 [2021-06-05 03:59:02,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82749 states. [2021-06-05 03:59:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82749 to 59640. [2021-06-05 03:59:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970220828652392) internal successors, (236780), 59639 states have internal predecessors, (236780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236780 transitions. [2021-06-05 03:59:04,164 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236780 transitions. Word has length 25 [2021-06-05 03:59:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:04,165 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236780 transitions. [2021-06-05 03:59:04,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236780 transitions. [2021-06-05 03:59:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:04,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:04,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:04,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:04,465 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 20 times [2021-06-05 03:59:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027116457] [2021-06-05 03:59:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:04,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027116457] [2021-06-05 03:59:04,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027116457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061809430] [2021-06-05 03:59:04,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:04,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061809430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:04,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177787462] [2021-06-05 03:59:04,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:04,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:04,640 INFO L87 Difference]: Start difference. First operand 59640 states and 236780 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:05,424 INFO L93 Difference]: Finished difference Result 60378 states and 238589 transitions. [2021-06-05 03:59:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:59:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:06,008 INFO L225 Difference]: With dead ends: 60378 [2021-06-05 03:59:06,008 INFO L226 Difference]: Without dead ends: 60371 [2021-06-05 03:59:06,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:59:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-06-05 03:59:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59640. [2021-06-05 03:59:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970187293549523) internal successors, (236778), 59639 states have internal predecessors, (236778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236778 transitions. [2021-06-05 03:59:07,564 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236778 transitions. Word has length 25 [2021-06-05 03:59:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:07,564 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236778 transitions. [2021-06-05 03:59:07,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236778 transitions. [2021-06-05 03:59:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:07,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:07,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:07,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:07,871 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 21 times [2021-06-05 03:59:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:07,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577531] [2021-06-05 03:59:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:07,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:07,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577531] [2021-06-05 03:59:07,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716754438] [2021-06-05 03:59:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:07,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:59:07,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716754438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:08,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:08,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000848385] [2021-06-05 03:59:08,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:08,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:08,045 INFO L87 Difference]: Start difference. First operand 59640 states and 236778 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:09,027 INFO L93 Difference]: Finished difference Result 61587 states and 241992 transitions. [2021-06-05 03:59:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:59:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:09,194 INFO L225 Difference]: With dead ends: 61587 [2021-06-05 03:59:09,194 INFO L226 Difference]: Without dead ends: 61587 [2021-06-05 03:59:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:59:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61587 states. [2021-06-05 03:59:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61587 to 59994. [2021-06-05 03:59:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59994 states, 59993 states have (on average 3.9657460037004317) internal successors, (237917), 59993 states have internal predecessors, (237917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59994 states to 59994 states and 237917 transitions. [2021-06-05 03:59:10,943 INFO L78 Accepts]: Start accepts. Automaton has 59994 states and 237917 transitions. Word has length 25 [2021-06-05 03:59:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:10,943 INFO L482 AbstractCegarLoop]: Abstraction has 59994 states and 237917 transitions. [2021-06-05 03:59:10,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 59994 states and 237917 transitions. [2021-06-05 03:59:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:11,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:11,043 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:11,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 03:59:11,244 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:11,244 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 22 times [2021-06-05 03:59:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906592638] [2021-06-05 03:59:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:11,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906592638] [2021-06-05 03:59:11,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906592638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925233557] [2021-06-05 03:59:11,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925233557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:11,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 03:59:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578600590] [2021-06-05 03:59:11,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:59:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:59:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:59:11,344 INFO L87 Difference]: Start difference. First operand 59994 states and 237917 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:11,826 INFO L93 Difference]: Finished difference Result 81683 states and 316037 transitions. [2021-06-05 03:59:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:11,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:12,035 INFO L225 Difference]: With dead ends: 81683 [2021-06-05 03:59:12,035 INFO L226 Difference]: Without dead ends: 81677 [2021-06-05 03:59:12,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81677 states. [2021-06-05 03:59:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81677 to 66665. [2021-06-05 03:59:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66665 states, 66664 states have (on average 3.9792541701668065) internal successors, (265273), 66664 states have internal predecessors, (265273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66665 states to 66665 states and 265273 transitions. [2021-06-05 03:59:14,154 INFO L78 Accepts]: Start accepts. Automaton has 66665 states and 265273 transitions. Word has length 25 [2021-06-05 03:59:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:14,154 INFO L482 AbstractCegarLoop]: Abstraction has 66665 states and 265273 transitions. [2021-06-05 03:59:14,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 66665 states and 265273 transitions. [2021-06-05 03:59:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:14,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:14,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:14,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 03:59:14,471 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 23 times [2021-06-05 03:59:14,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:14,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843860239] [2021-06-05 03:59:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:14,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843860239] [2021-06-05 03:59:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843860239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190516752] [2021-06-05 03:59:14,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:14,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190516752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:14,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:59:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049657021] [2021-06-05 03:59:14,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:59:14,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:59:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:59:14,602 INFO L87 Difference]: Start difference. First operand 66665 states and 265273 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 03:59:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:15,171 INFO L93 Difference]: Finished difference Result 88628 states and 338516 transitions. [2021-06-05 03:59:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:59:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:15,809 INFO L225 Difference]: With dead ends: 88628 [2021-06-05 03:59:15,809 INFO L226 Difference]: Without dead ends: 88621 [2021-06-05 03:59:15,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:59:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88621 states. [2021-06-05 03:59:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88621 to 65399. [2021-06-05 03:59:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65399 states, 65398 states have (on average 3.972644423376862) internal successors, (259803), 65398 states have internal predecessors, (259803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65399 states to 65399 states and 259803 transitions. [2021-06-05 03:59:17,490 INFO L78 Accepts]: Start accepts. Automaton has 65399 states and 259803 transitions. Word has length 25 [2021-06-05 03:59:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:17,490 INFO L482 AbstractCegarLoop]: Abstraction has 65399 states and 259803 transitions. [2021-06-05 03:59:17,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 03:59:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65399 states and 259803 transitions. [2021-06-05 03:59:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:17,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:17,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:17,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 03:59:17,801 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1983645204, now seen corresponding path program 24 times [2021-06-05 03:59:17,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:17,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056994443] [2021-06-05 03:59:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:17,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056994443] [2021-06-05 03:59:17,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056994443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679279999] [2021-06-05 03:59:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:17,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:59:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:17,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679279999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:17,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524431448] [2021-06-05 03:59:17,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:17,970 INFO L87 Difference]: Start difference. First operand 65399 states and 259803 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:19,282 INFO L93 Difference]: Finished difference Result 66631 states and 262831 transitions. [2021-06-05 03:59:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:59:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:19,459 INFO L225 Difference]: With dead ends: 66631 [2021-06-05 03:59:19,459 INFO L226 Difference]: Without dead ends: 66610 [2021-06-05 03:59:19,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:59:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66610 states. [2021-06-05 03:59:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66610 to 65301. [2021-06-05 03:59:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65301 states, 65300 states have (on average 3.9736600306278715) internal successors, (259480), 65300 states have internal predecessors, (259480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65301 states to 65301 states and 259480 transitions. [2021-06-05 03:59:20,953 INFO L78 Accepts]: Start accepts. Automaton has 65301 states and 259480 transitions. Word has length 25 [2021-06-05 03:59:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:20,953 INFO L482 AbstractCegarLoop]: Abstraction has 65301 states and 259480 transitions. [2021-06-05 03:59:20,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65301 states and 259480 transitions. [2021-06-05 03:59:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:21,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:21,060 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:21,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,260 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash -403061012, now seen corresponding path program 25 times [2021-06-05 03:59:21,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:21,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749274203] [2021-06-05 03:59:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:21,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:21,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749274203] [2021-06-05 03:59:21,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749274203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794480781] [2021-06-05 03:59:21,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:21,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794480781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:21,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 03:59:21,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452656064] [2021-06-05 03:59:21,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:21,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:21,383 INFO L87 Difference]: Start difference. First operand 65301 states and 259480 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 03:59:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:22,400 INFO L93 Difference]: Finished difference Result 88604 states and 339078 transitions. [2021-06-05 03:59:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:59:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:22,698 INFO L225 Difference]: With dead ends: 88604 [2021-06-05 03:59:22,698 INFO L226 Difference]: Without dead ends: 88597 [2021-06-05 03:59:22,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88597 states. [2021-06-05 03:59:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88597 to 66336. [2021-06-05 03:59:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66336 states, 66335 states have (on average 3.9726690284163713) internal successors, (263527), 66335 states have internal predecessors, (263527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66336 states to 66336 states and 263527 transitions. [2021-06-05 03:59:24,493 INFO L78 Accepts]: Start accepts. Automaton has 66336 states and 263527 transitions. Word has length 25 [2021-06-05 03:59:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:24,493 INFO L482 AbstractCegarLoop]: Abstraction has 66336 states and 263527 transitions. [2021-06-05 03:59:24,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 03:59:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 66336 states and 263527 transitions. [2021-06-05 03:59:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:24,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:24,602 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:24,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,803 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash 147370776, now seen corresponding path program 26 times [2021-06-05 03:59:24,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:24,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148132033] [2021-06-05 03:59:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:24,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148132033] [2021-06-05 03:59:24,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148132033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489773087] [2021-06-05 03:59:24,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489773087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:24,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464094955] [2021-06-05 03:59:24,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:24,986 INFO L87 Difference]: Start difference. First operand 66336 states and 263527 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:26,230 INFO L93 Difference]: Finished difference Result 67438 states and 266327 transitions. [2021-06-05 03:59:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:59:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:26,414 INFO L225 Difference]: With dead ends: 67438 [2021-06-05 03:59:26,414 INFO L226 Difference]: Without dead ends: 67396 [2021-06-05 03:59:26,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:59:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67396 states. [2021-06-05 03:59:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67396 to 66394. [2021-06-05 03:59:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66394 states, 66393 states have (on average 3.972045245733737) internal successors, (263716), 66393 states have internal predecessors, (263716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66394 states to 66394 states and 263716 transitions. [2021-06-05 03:59:28,052 INFO L78 Accepts]: Start accepts. Automaton has 66394 states and 263716 transitions. Word has length 25 [2021-06-05 03:59:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:28,052 INFO L482 AbstractCegarLoop]: Abstraction has 66394 states and 263716 transitions. [2021-06-05 03:59:28,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 66394 states and 263716 transitions. [2021-06-05 03:59:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:28,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:28,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:28,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 03:59:28,362 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash -329451636, now seen corresponding path program 27 times [2021-06-05 03:59:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:28,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551469631] [2021-06-05 03:59:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:28,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:28,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551469631] [2021-06-05 03:59:28,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551469631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858419656] [2021-06-05 03:59:28,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:59:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:28,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:28,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858419656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:28,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:28,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119268717] [2021-06-05 03:59:28,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:28,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:28,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:28,576 INFO L87 Difference]: Start difference. First operand 66394 states and 263716 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,222 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 03:59:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:29,999 INFO L93 Difference]: Finished difference Result 67779 states and 267269 transitions. [2021-06-05 03:59:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:59:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:30,177 INFO L225 Difference]: With dead ends: 67779 [2021-06-05 03:59:30,177 INFO L226 Difference]: Without dead ends: 67779 [2021-06-05 03:59:30,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:59:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67779 states. [2021-06-05 03:59:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67779 to 66296. [2021-06-05 03:59:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66296 states, 66295 states have (on average 3.9728335470246625) internal successors, (263379), 66295 states have internal predecessors, (263379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66296 states to 66296 states and 263379 transitions. [2021-06-05 03:59:31,752 INFO L78 Accepts]: Start accepts. Automaton has 66296 states and 263379 transitions. Word has length 25 [2021-06-05 03:59:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:31,753 INFO L482 AbstractCegarLoop]: Abstraction has 66296 states and 263379 transitions. [2021-06-05 03:59:31,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 66296 states and 263379 transitions. [2021-06-05 03:59:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:31,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:31,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:32,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:32,061 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash 267542668, now seen corresponding path program 28 times [2021-06-05 03:59:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:32,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523216200] [2021-06-05 03:59:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:32,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:32,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523216200] [2021-06-05 03:59:32,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523216200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047617433] [2021-06-05 03:59:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:32,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:32,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047617433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:32,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 03:59:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422625047] [2021-06-05 03:59:32,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:59:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:59:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:59:32,581 INFO L87 Difference]: Start difference. First operand 66296 states and 263379 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:33,105 INFO L93 Difference]: Finished difference Result 77336 states and 298514 transitions. [2021-06-05 03:59:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:33,307 INFO L225 Difference]: With dead ends: 77336 [2021-06-05 03:59:33,307 INFO L226 Difference]: Without dead ends: 77318 [2021-06-05 03:59:33,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:59:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77318 states. [2021-06-05 03:59:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77318 to 66229. [2021-06-05 03:59:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66229 states, 66228 states have (on average 3.9722473878118016) internal successors, (263074), 66228 states have internal predecessors, (263074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66229 states to 66229 states and 263074 transitions. [2021-06-05 03:59:35,034 INFO L78 Accepts]: Start accepts. Automaton has 66229 states and 263074 transitions. Word has length 25 [2021-06-05 03:59:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:35,034 INFO L482 AbstractCegarLoop]: Abstraction has 66229 states and 263074 transitions. [2021-06-05 03:59:35,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 66229 states and 263074 transitions. [2021-06-05 03:59:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:35,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:35,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:35,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 03:59:35,653 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1076367576, now seen corresponding path program 29 times [2021-06-05 03:59:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:35,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17985855] [2021-06-05 03:59:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:35,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17985855] [2021-06-05 03:59:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17985855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033375474] [2021-06-05 03:59:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:35,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:35,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:35,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033375474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:35,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:59:35,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650548595] [2021-06-05 03:59:35,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:59:35,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:59:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:59:35,772 INFO L87 Difference]: Start difference. First operand 66229 states and 263074 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:36,322 INFO L93 Difference]: Finished difference Result 79945 states and 311462 transitions. [2021-06-05 03:59:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:36,537 INFO L225 Difference]: With dead ends: 79945 [2021-06-05 03:59:36,537 INFO L226 Difference]: Without dead ends: 79938 [2021-06-05 03:59:36,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79938 states. [2021-06-05 03:59:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79938 to 70553. [2021-06-05 03:59:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70553 states, 70552 states have (on average 3.97304116112938) internal successors, (280306), 70552 states have internal predecessors, (280306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70553 states to 70553 states and 280306 transitions. [2021-06-05 03:59:38,895 INFO L78 Accepts]: Start accepts. Automaton has 70553 states and 280306 transitions. Word has length 25 [2021-06-05 03:59:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:38,896 INFO L482 AbstractCegarLoop]: Abstraction has 70553 states and 280306 transitions. [2021-06-05 03:59:38,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 70553 states and 280306 transitions. [2021-06-05 03:59:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:39,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:39,048 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:39,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,261 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -525935788, now seen corresponding path program 30 times [2021-06-05 03:59:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:39,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588372903] [2021-06-05 03:59:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:39,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:39,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588372903] [2021-06-05 03:59:39,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588372903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490871419] [2021-06-05 03:59:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490871419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439185071] [2021-06-05 03:59:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:39,491 INFO L87 Difference]: Start difference. First operand 70553 states and 280306 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:40,412 INFO L93 Difference]: Finished difference Result 72588 states and 285810 transitions. [2021-06-05 03:59:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:59:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:40,604 INFO L225 Difference]: With dead ends: 72588 [2021-06-05 03:59:40,604 INFO L226 Difference]: Without dead ends: 72546 [2021-06-05 03:59:40,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:59:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72546 states. [2021-06-05 03:59:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72546 to 70799. [2021-06-05 03:59:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70799 states, 70798 states have (on average 3.969787282126614) internal successors, (281053), 70798 states have internal predecessors, (281053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70799 states to 70799 states and 281053 transitions. [2021-06-05 03:59:42,666 INFO L78 Accepts]: Start accepts. Automaton has 70799 states and 281053 transitions. Word has length 25 [2021-06-05 03:59:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:42,666 INFO L482 AbstractCegarLoop]: Abstraction has 70799 states and 281053 transitions. [2021-06-05 03:59:42,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 70799 states and 281053 transitions. [2021-06-05 03:59:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:42,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:42,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:42,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:42,984 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash 130107116, now seen corresponding path program 31 times [2021-06-05 03:59:42,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:42,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277371787] [2021-06-05 03:59:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:43,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277371787] [2021-06-05 03:59:43,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277371787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125793494] [2021-06-05 03:59:43,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:59:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125793494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:43,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:59:43,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743419264] [2021-06-05 03:59:43,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:43,131 INFO L87 Difference]: Start difference. First operand 70799 states and 281053 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:43,679 INFO L93 Difference]: Finished difference Result 78286 states and 305005 transitions. [2021-06-05 03:59:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:43,896 INFO L225 Difference]: With dead ends: 78286 [2021-06-05 03:59:43,897 INFO L226 Difference]: Without dead ends: 78279 [2021-06-05 03:59:43,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78279 states. [2021-06-05 03:59:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78279 to 70642. [2021-06-05 03:59:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70642 states, 70641 states have (on average 3.966903073286052) internal successors, (280226), 70641 states have internal predecessors, (280226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70642 states to 70642 states and 280226 transitions. [2021-06-05 03:59:45,951 INFO L78 Accepts]: Start accepts. Automaton has 70642 states and 280226 transitions. Word has length 25 [2021-06-05 03:59:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:45,951 INFO L482 AbstractCegarLoop]: Abstraction has 70642 states and 280226 transitions. [2021-06-05 03:59:45,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 70642 states and 280226 transitions. [2021-06-05 03:59:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:46,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:46,069 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:46,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 03:59:46,269 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1963061844, now seen corresponding path program 32 times [2021-06-05 03:59:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:46,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900161251] [2021-06-05 03:59:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:46,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900161251] [2021-06-05 03:59:46,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900161251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465595584] [2021-06-05 03:59:46,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:46,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:59:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465595584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:46,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670089944] [2021-06-05 03:59:46,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:46,446 INFO L87 Difference]: Start difference. First operand 70642 states and 280226 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:47,610 INFO L93 Difference]: Finished difference Result 72232 states and 284421 transitions. [2021-06-05 03:59:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:59:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:47,884 INFO L225 Difference]: With dead ends: 72232 [2021-06-05 03:59:47,884 INFO L226 Difference]: Without dead ends: 72158 [2021-06-05 03:59:47,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:59:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72158 states. [2021-06-05 03:59:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72158 to 70811. [2021-06-05 03:59:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70811 states, 70810 states have (on average 3.964454173139387) internal successors, (280723), 70810 states have internal predecessors, (280723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70811 states to 70811 states and 280723 transitions. [2021-06-05 03:59:49,480 INFO L78 Accepts]: Start accepts. Automaton has 70811 states and 280723 transitions. Word has length 25 [2021-06-05 03:59:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:49,480 INFO L482 AbstractCegarLoop]: Abstraction has 70811 states and 280723 transitions. [2021-06-05 03:59:49,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 70811 states and 280723 transitions. [2021-06-05 03:59:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:49,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:49,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:49,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 03:59:49,800 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2056806376, now seen corresponding path program 100 times [2021-06-05 03:59:49,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:49,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221829322] [2021-06-05 03:59:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:49,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:49,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221829322] [2021-06-05 03:59:49,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221829322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149235815] [2021-06-05 03:59:49,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:49,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:59:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149235815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:49,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:59:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101941312] [2021-06-05 03:59:49,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:49,972 INFO L87 Difference]: Start difference. First operand 70811 states and 280723 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:51,581 INFO L93 Difference]: Finished difference Result 88145 states and 342080 transitions. [2021-06-05 03:59:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:59:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:51,810 INFO L225 Difference]: With dead ends: 88145 [2021-06-05 03:59:51,810 INFO L226 Difference]: Without dead ends: 88121 [2021-06-05 03:59:51,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 03:59:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88121 states. [2021-06-05 03:59:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88121 to 70823. [2021-06-05 03:59:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70823 states, 70822 states have (on average 3.964191917765666) internal successors, (280752), 70822 states have internal predecessors, (280752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70823 states to 70823 states and 280752 transitions. [2021-06-05 03:59:53,692 INFO L78 Accepts]: Start accepts. Automaton has 70823 states and 280752 transitions. Word has length 25 [2021-06-05 03:59:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:53,692 INFO L482 AbstractCegarLoop]: Abstraction has 70823 states and 280752 transitions. [2021-06-05 03:59:53,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 70823 states and 280752 transitions. [2021-06-05 03:59:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:54,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:54,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:54,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 03:59:54,421 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1316458780, now seen corresponding path program 101 times [2021-06-05 03:59:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:54,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8620040] [2021-06-05 03:59:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8620040] [2021-06-05 03:59:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8620040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307494567] [2021-06-05 03:59:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:54,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:59:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307494567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:54,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:59:54,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577065902] [2021-06-05 03:59:54,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:54,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:54,595 INFO L87 Difference]: Start difference. First operand 70823 states and 280752 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:56,042 INFO L93 Difference]: Finished difference Result 94031 states and 360249 transitions. [2021-06-05 03:59:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:59:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:56,294 INFO L225 Difference]: With dead ends: 94031 [2021-06-05 03:59:56,294 INFO L226 Difference]: Without dead ends: 94019 [2021-06-05 03:59:56,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 828.0ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:59:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94019 states. [2021-06-05 03:59:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94019 to 70832. [2021-06-05 03:59:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70832 states, 70831 states have (on average 3.9640694046392118) internal successors, (280779), 70831 states have internal predecessors, (280779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70832 states to 70832 states and 280779 transitions. [2021-06-05 03:59:58,389 INFO L78 Accepts]: Start accepts. Automaton has 70832 states and 280779 transitions. Word has length 25 [2021-06-05 03:59:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:58,389 INFO L482 AbstractCegarLoop]: Abstraction has 70832 states and 280779 transitions. [2021-06-05 03:59:58,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 70832 states and 280779 transitions. [2021-06-05 03:59:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:58,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:58,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:58,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 03:59:58,716 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -337901336, now seen corresponding path program 102 times [2021-06-05 03:59:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:58,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035288197] [2021-06-05 03:59:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035288197] [2021-06-05 03:59:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035288197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593129441] [2021-06-05 03:59:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:58,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:59:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:58,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593129441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:58,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:59:58,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384453982] [2021-06-05 03:59:58,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:58,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:58,921 INFO L87 Difference]: Start difference. First operand 70832 states and 280779 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:01,633 INFO L93 Difference]: Finished difference Result 97854 states and 373707 transitions. [2021-06-05 04:00:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:00:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:01,957 INFO L225 Difference]: With dead ends: 97854 [2021-06-05 04:00:01,958 INFO L226 Difference]: Without dead ends: 97833 [2021-06-05 04:00:01,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1826.6ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 04:00:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97833 states. [2021-06-05 04:00:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97833 to 70852. [2021-06-05 04:00:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70852 states, 70851 states have (on average 3.9636702375407546) internal successors, (280830), 70851 states have internal predecessors, (280830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70852 states to 70852 states and 280830 transitions. [2021-06-05 04:00:05,379 INFO L78 Accepts]: Start accepts. Automaton has 70852 states and 280830 transitions. Word has length 25 [2021-06-05 04:00:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:05,379 INFO L482 AbstractCegarLoop]: Abstraction has 70852 states and 280830 transitions. [2021-06-05 04:00:05,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 70852 states and 280830 transitions. [2021-06-05 04:00:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:05,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:05,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:05,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 04:00:05,710 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1109129320, now seen corresponding path program 33 times [2021-06-05 04:00:05,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:05,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649714465] [2021-06-05 04:00:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:05,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:05,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649714465] [2021-06-05 04:00:05,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649714465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:05,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544172089] [2021-06-05 04:00:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:05,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:00:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:06,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544172089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:06,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:06,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:06,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884067734] [2021-06-05 04:00:06,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:06,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:06,021 INFO L87 Difference]: Start difference. First operand 70852 states and 280830 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:06,667 INFO L93 Difference]: Finished difference Result 71288 states and 281968 transitions. [2021-06-05 04:00:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:00:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:06,868 INFO L225 Difference]: With dead ends: 71288 [2021-06-05 04:00:06,868 INFO L226 Difference]: Without dead ends: 71288 [2021-06-05 04:00:06,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71288 states. [2021-06-05 04:00:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71288 to 70868. [2021-06-05 04:00:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70868 states, 70867 states have (on average 3.9633962210902114) internal successors, (280874), 70867 states have internal predecessors, (280874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70868 states to 70868 states and 280874 transitions. [2021-06-05 04:00:08,847 INFO L78 Accepts]: Start accepts. Automaton has 70868 states and 280874 transitions. Word has length 25 [2021-06-05 04:00:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:08,847 INFO L482 AbstractCegarLoop]: Abstraction has 70868 states and 280874 transitions. [2021-06-05 04:00:08,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 70868 states and 280874 transitions. [2021-06-05 04:00:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:08,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:08,972 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:09,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 04:00:09,173 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1906283616, now seen corresponding path program 34 times [2021-06-05 04:00:09,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:09,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741233538] [2021-06-05 04:00:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:09,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:09,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741233538] [2021-06-05 04:00:09,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741233538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:09,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491021822] [2021-06-05 04:00:09,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:09,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:09,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491021822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:09,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:09,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977641660] [2021-06-05 04:00:09,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:09,375 INFO L87 Difference]: Start difference. First operand 70868 states and 280874 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:10,079 INFO L93 Difference]: Finished difference Result 71414 states and 282279 transitions. [2021-06-05 04:00:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:00:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:10,708 INFO L225 Difference]: With dead ends: 71414 [2021-06-05 04:00:10,708 INFO L226 Difference]: Without dead ends: 71414 [2021-06-05 04:00:10,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:00:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71414 states. [2021-06-05 04:00:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71414 to 70860. [2021-06-05 04:00:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70860 states, 70859 states have (on average 3.9635614389138993) internal successors, (280854), 70859 states have internal predecessors, (280854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70860 states to 70860 states and 280854 transitions. [2021-06-05 04:00:12,371 INFO L78 Accepts]: Start accepts. Automaton has 70860 states and 280854 transitions. Word has length 25 [2021-06-05 04:00:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:12,371 INFO L482 AbstractCegarLoop]: Abstraction has 70860 states and 280854 transitions. [2021-06-05 04:00:12,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 70860 states and 280854 transitions. [2021-06-05 04:00:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:12,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:12,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:12,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:12,697 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 819946400, now seen corresponding path program 35 times [2021-06-05 04:00:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704765845] [2021-06-05 04:00:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:12,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:12,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704765845] [2021-06-05 04:00:12,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704765845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233119496] [2021-06-05 04:00:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:12,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:00:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:12,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233119496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:12,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:12,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:12,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061559296] [2021-06-05 04:00:12,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:12,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:12,879 INFO L87 Difference]: Start difference. First operand 70860 states and 280854 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:14,119 INFO L93 Difference]: Finished difference Result 71971 states and 283792 transitions. [2021-06-05 04:00:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:00:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:14,379 INFO L225 Difference]: With dead ends: 71971 [2021-06-05 04:00:14,380 INFO L226 Difference]: Without dead ends: 71971 [2021-06-05 04:00:14,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:00:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71971 states. [2021-06-05 04:00:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71971 to 70896. [2021-06-05 04:00:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70896 states, 70895 states have (on average 3.9631849918894138) internal successors, (280970), 70895 states have internal predecessors, (280970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70896 states to 70896 states and 280970 transitions. [2021-06-05 04:00:16,122 INFO L78 Accepts]: Start accepts. Automaton has 70896 states and 280970 transitions. Word has length 25 [2021-06-05 04:00:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:16,123 INFO L482 AbstractCegarLoop]: Abstraction has 70896 states and 280970 transitions. [2021-06-05 04:00:16,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 70896 states and 280970 transitions. [2021-06-05 04:00:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:16,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:16,255 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:16,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 04:00:16,455 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash 693070752, now seen corresponding path program 36 times [2021-06-05 04:00:16,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:16,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248819299] [2021-06-05 04:00:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:16,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248819299] [2021-06-05 04:00:16,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248819299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:16,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593546271] [2021-06-05 04:00:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:16,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:00:16,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:16,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593546271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:16,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:16,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990248369] [2021-06-05 04:00:16,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:16,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:16,644 INFO L87 Difference]: Start difference. First operand 70896 states and 280970 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:17,828 INFO L93 Difference]: Finished difference Result 71691 states and 283040 transitions. [2021-06-05 04:00:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:00:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:18,049 INFO L225 Difference]: With dead ends: 71691 [2021-06-05 04:00:18,049 INFO L226 Difference]: Without dead ends: 71684 [2021-06-05 04:00:18,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:00:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71684 states. [2021-06-05 04:00:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71684 to 70896. [2021-06-05 04:00:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70896 states, 70895 states have (on average 3.9631567811552295) internal successors, (280968), 70895 states have internal predecessors, (280968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70896 states to 70896 states and 280968 transitions. [2021-06-05 04:00:19,797 INFO L78 Accepts]: Start accepts. Automaton has 70896 states and 280968 transitions. Word has length 25 [2021-06-05 04:00:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:19,797 INFO L482 AbstractCegarLoop]: Abstraction has 70896 states and 280968 transitions. [2021-06-05 04:00:19,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 70896 states and 280968 transitions. [2021-06-05 04:00:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:19,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:19,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:20,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:20,123 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1193560492, now seen corresponding path program 37 times [2021-06-05 04:00:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960100206] [2021-06-05 04:00:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:20,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960100206] [2021-06-05 04:00:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960100206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91194011] [2021-06-05 04:00:20,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:20,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:20,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91194011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:20,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:20,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:00:20,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399730818] [2021-06-05 04:00:20,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:20,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:20,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:20,309 INFO L87 Difference]: Start difference. First operand 70896 states and 280968 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:21,583 INFO L93 Difference]: Finished difference Result 72744 states and 285939 transitions. [2021-06-05 04:00:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:00:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:21,792 INFO L225 Difference]: With dead ends: 72744 [2021-06-05 04:00:21,792 INFO L226 Difference]: Without dead ends: 72736 [2021-06-05 04:00:21,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:00:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72736 states. [2021-06-05 04:00:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72736 to 70938. [2021-06-05 04:00:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70938 states, 70937 states have (on average 3.962600617449286) internal successors, (281095), 70937 states have internal predecessors, (281095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70938 states to 70938 states and 281095 transitions. [2021-06-05 04:00:23,507 INFO L78 Accepts]: Start accepts. Automaton has 70938 states and 281095 transitions. Word has length 25 [2021-06-05 04:00:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:23,508 INFO L482 AbstractCegarLoop]: Abstraction has 70938 states and 281095 transitions. [2021-06-05 04:00:23,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 70938 states and 281095 transitions. [2021-06-05 04:00:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:23,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:23,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:23,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,841 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1320436140, now seen corresponding path program 38 times [2021-06-05 04:00:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:23,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764227649] [2021-06-05 04:00:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:23,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764227649] [2021-06-05 04:00:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764227649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640752599] [2021-06-05 04:00:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:23,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:23,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:24,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640752599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:24,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:24,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:00:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916303875] [2021-06-05 04:00:24,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:24,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:24,013 INFO L87 Difference]: Start difference. First operand 70938 states and 281095 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:25,236 INFO L93 Difference]: Finished difference Result 72488 states and 285225 transitions. [2021-06-05 04:00:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:00:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:25,446 INFO L225 Difference]: With dead ends: 72488 [2021-06-05 04:00:25,446 INFO L226 Difference]: Without dead ends: 72474 [2021-06-05 04:00:25,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:00:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72474 states. [2021-06-05 04:00:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72474 to 70906. [2021-06-05 04:00:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70906 states, 70905 states have (on average 3.9629504266271773) internal successors, (280993), 70905 states have internal predecessors, (280993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70906 states to 70906 states and 280993 transitions. [2021-06-05 04:00:27,144 INFO L78 Accepts]: Start accepts. Automaton has 70906 states and 280993 transitions. Word has length 25 [2021-06-05 04:00:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:27,144 INFO L482 AbstractCegarLoop]: Abstraction has 70906 states and 280993 transitions. [2021-06-05 04:00:27,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 70906 states and 280993 transitions. [2021-06-05 04:00:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:27,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:27,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:27,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:27,924 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1138256728, now seen corresponding path program 39 times [2021-06-05 04:00:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:27,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984994386] [2021-06-05 04:00:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:27,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984994386] [2021-06-05 04:00:27,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984994386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381686814] [2021-06-05 04:00:27,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:27,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:00:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381686814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:28,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:28,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131383067] [2021-06-05 04:00:28,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:28,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:28,103 INFO L87 Difference]: Start difference. First operand 70906 states and 280993 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:28,811 INFO L93 Difference]: Finished difference Result 72105 states and 284123 transitions. [2021-06-05 04:00:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:00:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:29,017 INFO L225 Difference]: With dead ends: 72105 [2021-06-05 04:00:29,017 INFO L226 Difference]: Without dead ends: 72063 [2021-06-05 04:00:29,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:00:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72063 states. [2021-06-05 04:00:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72063 to 70865. [2021-06-05 04:00:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70865 states, 70864 states have (on average 3.9636627906976742) internal successors, (280881), 70864 states have internal predecessors, (280881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70865 states to 70865 states and 280881 transitions. [2021-06-05 04:00:31,164 INFO L78 Accepts]: Start accepts. Automaton has 70865 states and 280881 transitions. Word has length 25 [2021-06-05 04:00:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:31,165 INFO L482 AbstractCegarLoop]: Abstraction has 70865 states and 280881 transitions. [2021-06-05 04:00:31,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 70865 states and 280881 transitions. [2021-06-05 04:00:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:31,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:31,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:31,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 04:00:31,492 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 586655720, now seen corresponding path program 103 times [2021-06-05 04:00:31,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:31,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923314955] [2021-06-05 04:00:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:31,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923314955] [2021-06-05 04:00:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923314955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305222859] [2021-06-05 04:00:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:00:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:31,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305222859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:31,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:31,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 04:00:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022912242] [2021-06-05 04:00:31,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:31,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:31,669 INFO L87 Difference]: Start difference. First operand 70865 states and 280881 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:32,923 INFO L93 Difference]: Finished difference Result 91926 states and 355848 transitions. [2021-06-05 04:00:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:00:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:33,575 INFO L225 Difference]: With dead ends: 91926 [2021-06-05 04:00:33,575 INFO L226 Difference]: Without dead ends: 91902 [2021-06-05 04:00:33,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=506, Invalid=1846, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:00:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91902 states. [2021-06-05 04:00:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91902 to 70869. [2021-06-05 04:00:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70869 states, 70868 states have (on average 3.9635237342665235) internal successors, (280887), 70868 states have internal predecessors, (280887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70869 states to 70869 states and 280887 transitions. [2021-06-05 04:00:35,320 INFO L78 Accepts]: Start accepts. Automaton has 70869 states and 280887 transitions. Word has length 25 [2021-06-05 04:00:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:35,320 INFO L482 AbstractCegarLoop]: Abstraction has 70869 states and 280887 transitions. [2021-06-05 04:00:35,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 70869 states and 280887 transitions. [2021-06-05 04:00:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:35,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:35,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:35,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,642 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1508357860, now seen corresponding path program 104 times [2021-06-05 04:00:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:35,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243183998] [2021-06-05 04:00:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:35,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243183998] [2021-06-05 04:00:35,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243183998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104240595] [2021-06-05 04:00:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:35,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:00:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104240595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:35,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 04:00:35,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579932926] [2021-06-05 04:00:35,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:35,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:35,836 INFO L87 Difference]: Start difference. First operand 70869 states and 280887 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:37,986 INFO L93 Difference]: Finished difference Result 118622 states and 455374 transitions. [2021-06-05 04:00:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:00:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:38,329 INFO L225 Difference]: With dead ends: 118622 [2021-06-05 04:00:38,329 INFO L226 Difference]: Without dead ends: 118608 [2021-06-05 04:00:38,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=781, Invalid=3251, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:00:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118608 states. [2021-06-05 04:00:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118608 to 71195. [2021-06-05 04:00:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71195 states, 71194 states have (on average 3.9650110964407115) internal successors, (282285), 71194 states have internal predecessors, (282285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71195 states to 71195 states and 282285 transitions. [2021-06-05 04:00:40,884 INFO L78 Accepts]: Start accepts. Automaton has 71195 states and 282285 transitions. Word has length 25 [2021-06-05 04:00:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:40,884 INFO L482 AbstractCegarLoop]: Abstraction has 71195 states and 282285 transitions. [2021-06-05 04:00:40,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71195 states and 282285 transitions. [2021-06-05 04:00:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:41,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:41,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:41,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 04:00:41,224 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1808051992, now seen corresponding path program 105 times [2021-06-05 04:00:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180063678] [2021-06-05 04:00:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180063678] [2021-06-05 04:00:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180063678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478801900] [2021-06-05 04:00:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:41,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:00:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:41,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:00:41,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:41,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478801900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:41,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:41,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 04:00:41,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013656077] [2021-06-05 04:00:41,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:41,404 INFO L87 Difference]: Start difference. First operand 71195 states and 282285 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:43,539 INFO L93 Difference]: Finished difference Result 122405 states and 469340 transitions. [2021-06-05 04:00:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 04:00:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:43,905 INFO L225 Difference]: With dead ends: 122405 [2021-06-05 04:00:43,905 INFO L226 Difference]: Without dead ends: 122405 [2021-06-05 04:00:43,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1003.2ms TimeCoverageRelationStatistics Valid=750, Invalid=2910, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:00:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122405 states. [2021-06-05 04:00:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122405 to 71168. [2021-06-05 04:00:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71168 states, 71167 states have (on average 3.964787050177751) internal successors, (282162), 71167 states have internal predecessors, (282162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71168 states to 71168 states and 282162 transitions. [2021-06-05 04:00:46,548 INFO L78 Accepts]: Start accepts. Automaton has 71168 states and 282162 transitions. Word has length 25 [2021-06-05 04:00:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:46,548 INFO L482 AbstractCegarLoop]: Abstraction has 71168 states and 282162 transitions. [2021-06-05 04:00:46,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 71168 states and 282162 transitions. [2021-06-05 04:00:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:46,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:46,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:46,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 04:00:46,875 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash -813211544, now seen corresponding path program 40 times [2021-06-05 04:00:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:46,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748057774] [2021-06-05 04:00:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:46,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:46,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748057774] [2021-06-05 04:00:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748057774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:46,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688928651] [2021-06-05 04:00:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:46,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:46,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:46,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:46,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:47,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688928651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:47,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:47,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78719193] [2021-06-05 04:00:47,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:47,062 INFO L87 Difference]: Start difference. First operand 71168 states and 282162 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:48,101 INFO L93 Difference]: Finished difference Result 71556 states and 283218 transitions. [2021-06-05 04:00:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:00:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:48,411 INFO L225 Difference]: With dead ends: 71556 [2021-06-05 04:00:48,412 INFO L226 Difference]: Without dead ends: 71556 [2021-06-05 04:00:48,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:00:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71556 states. [2021-06-05 04:00:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71556 to 71214. [2021-06-05 04:00:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71214 states, 71213 states have (on average 3.9642059736284105) internal successors, (282303), 71213 states have internal predecessors, (282303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71214 states to 71214 states and 282303 transitions. [2021-06-05 04:00:50,128 INFO L78 Accepts]: Start accepts. Automaton has 71214 states and 282303 transitions. Word has length 25 [2021-06-05 04:00:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 71214 states and 282303 transitions. [2021-06-05 04:00:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71214 states and 282303 transitions. [2021-06-05 04:00:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:50,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:50,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:50,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:50,458 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash 466342816, now seen corresponding path program 41 times [2021-06-05 04:00:50,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:50,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695931285] [2021-06-05 04:00:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:50,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695931285] [2021-06-05 04:00:50,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695931285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:50,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989375904] [2021-06-05 04:00:50,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:50,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:00:50,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:50,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989375904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:50,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:50,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383037652] [2021-06-05 04:00:50,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:50,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:50,638 INFO L87 Difference]: Start difference. First operand 71214 states and 282303 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:51,892 INFO L93 Difference]: Finished difference Result 71934 states and 284187 transitions. [2021-06-05 04:00:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:00:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:52,342 INFO L225 Difference]: With dead ends: 71934 [2021-06-05 04:00:52,342 INFO L226 Difference]: Without dead ends: 71934 [2021-06-05 04:00:52,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:00:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71934 states. [2021-06-05 04:00:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71934 to 71214. [2021-06-05 04:00:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71214 states, 71213 states have (on average 3.9642059736284105) internal successors, (282303), 71213 states have internal predecessors, (282303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71214 states to 71214 states and 282303 transitions. [2021-06-05 04:00:54,646 INFO L78 Accepts]: Start accepts. Automaton has 71214 states and 282303 transitions. Word has length 25 [2021-06-05 04:00:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:54,646 INFO L482 AbstractCegarLoop]: Abstraction has 71214 states and 282303 transitions. [2021-06-05 04:00:54,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 71214 states and 282303 transitions. [2021-06-05 04:00:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:54,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:54,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:54,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 04:00:54,974 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1102394464, now seen corresponding path program 42 times [2021-06-05 04:00:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:54,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929325242] [2021-06-05 04:00:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:55,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:55,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929325242] [2021-06-05 04:00:55,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929325242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:55,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515908564] [2021-06-05 04:00:55,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:55,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:00:55,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515908564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:55,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:55,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310118131] [2021-06-05 04:00:55,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:55,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:55,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:55,154 INFO L87 Difference]: Start difference. First operand 71214 states and 282303 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:56,459 INFO L93 Difference]: Finished difference Result 72449 states and 285567 transitions. [2021-06-05 04:00:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:00:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:00:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:56,694 INFO L225 Difference]: With dead ends: 72449 [2021-06-05 04:00:56,694 INFO L226 Difference]: Without dead ends: 72449 [2021-06-05 04:00:56,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:00:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72449 states. [2021-06-05 04:00:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72449 to 71236. [2021-06-05 04:00:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71236 states, 71235 states have (on average 3.963978381413631) internal successors, (282374), 71235 states have internal predecessors, (282374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71236 states to 71236 states and 282374 transitions. [2021-06-05 04:00:58,388 INFO L78 Accepts]: Start accepts. Automaton has 71236 states and 282374 transitions. Word has length 25 [2021-06-05 04:00:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:58,388 INFO L482 AbstractCegarLoop]: Abstraction has 71236 states and 282374 transitions. [2021-06-05 04:00:58,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 71236 states and 282374 transitions. [2021-06-05 04:00:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:00:58,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:58,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:58,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 04:00:58,715 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1229270112, now seen corresponding path program 43 times [2021-06-05 04:00:58,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:58,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415022421] [2021-06-05 04:00:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:58,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415022421] [2021-06-05 04:00:58,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415022421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461055880] [2021-06-05 04:00:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:00:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461055880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:58,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:00:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041994752] [2021-06-05 04:00:58,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:58,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:58,934 INFO L87 Difference]: Start difference. First operand 71236 states and 282374 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:00,080 INFO L93 Difference]: Finished difference Result 72089 states and 284601 transitions. [2021-06-05 04:01:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:01:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:00,281 INFO L225 Difference]: With dead ends: 72089 [2021-06-05 04:01:00,281 INFO L226 Difference]: Without dead ends: 72082 [2021-06-05 04:01:00,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:01:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72082 states. [2021-06-05 04:01:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72082 to 71154. [2021-06-05 04:01:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71154 states, 71153 states have (on average 3.96476606748837) internal successors, (282105), 71153 states have internal predecessors, (282105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71154 states to 71154 states and 282105 transitions. [2021-06-05 04:01:01,985 INFO L78 Accepts]: Start accepts. Automaton has 71154 states and 282105 transitions. Word has length 25 [2021-06-05 04:01:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:01,985 INFO L482 AbstractCegarLoop]: Abstraction has 71154 states and 282105 transitions. [2021-06-05 04:01:01,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 71154 states and 282105 transitions. [2021-06-05 04:01:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:02,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:02,107 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:02,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:02,308 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash -559391772, now seen corresponding path program 44 times [2021-06-05 04:01:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:02,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575269862] [2021-06-05 04:01:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:02,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575269862] [2021-06-05 04:01:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575269862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641612094] [2021-06-05 04:01:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:02,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:02,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:02,776 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 04:01:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:02,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641612094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:02,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:02,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197057475] [2021-06-05 04:01:02,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:02,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:02,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:02,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:02,932 INFO L87 Difference]: Start difference. First operand 71154 states and 282105 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:03,484 INFO L93 Difference]: Finished difference Result 71508 states and 283066 transitions. [2021-06-05 04:01:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:01:03,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:03,677 INFO L225 Difference]: With dead ends: 71508 [2021-06-05 04:01:03,677 INFO L226 Difference]: Without dead ends: 71508 [2021-06-05 04:01:03,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:01:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71508 states. [2021-06-05 04:01:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71508 to 71116. [2021-06-05 04:01:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71116 states, 71115 states have (on average 3.965155030584265) internal successors, (281982), 71115 states have internal predecessors, (281982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71116 states to 71116 states and 281982 transitions. [2021-06-05 04:01:05,358 INFO L78 Accepts]: Start accepts. Automaton has 71116 states and 281982 transitions. Word has length 25 [2021-06-05 04:01:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:05,359 INFO L482 AbstractCegarLoop]: Abstraction has 71116 states and 281982 transitions. [2021-06-05 04:01:05,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71116 states and 281982 transitions. [2021-06-05 04:01:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:05,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:05,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:05,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:05,689 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -863069536, now seen corresponding path program 106 times [2021-06-05 04:01:05,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:05,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789084818] [2021-06-05 04:01:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:06,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789084818] [2021-06-05 04:01:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789084818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248618570] [2021-06-05 04:01:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:06,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:01:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248618570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:06,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 04:01:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182396463] [2021-06-05 04:01:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:01:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:01:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:06,225 INFO L87 Difference]: Start difference. First operand 71116 states and 281982 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:07,095 INFO L93 Difference]: Finished difference Result 87276 states and 339273 transitions. [2021-06-05 04:01:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:01:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:07,324 INFO L225 Difference]: With dead ends: 87276 [2021-06-05 04:01:07,324 INFO L226 Difference]: Without dead ends: 87248 [2021-06-05 04:01:07,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:01:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87248 states. [2021-06-05 04:01:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87248 to 71104. [2021-06-05 04:01:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71104 states, 71103 states have (on average 3.965402303700266) internal successors, (281952), 71103 states have internal predecessors, (281952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71104 states to 71104 states and 281952 transitions. [2021-06-05 04:01:09,531 INFO L78 Accepts]: Start accepts. Automaton has 71104 states and 281952 transitions. Word has length 25 [2021-06-05 04:01:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:09,531 INFO L482 AbstractCegarLoop]: Abstraction has 71104 states and 281952 transitions. [2021-06-05 04:01:09,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 71104 states and 281952 transitions. [2021-06-05 04:01:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:09,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:09,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:09,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:09,852 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash -797437524, now seen corresponding path program 107 times [2021-06-05 04:01:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:09,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916424390] [2021-06-05 04:01:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:09,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916424390] [2021-06-05 04:01:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916424390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368316602] [2021-06-05 04:01:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:09,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:01:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:01:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:10,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368316602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:10,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:10,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:01:10,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249682026] [2021-06-05 04:01:10,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:01:10,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:01:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:01:10,006 INFO L87 Difference]: Start difference. First operand 71104 states and 281952 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:12,050 INFO L93 Difference]: Finished difference Result 120833 states and 461051 transitions. [2021-06-05 04:01:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 04:01:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:12,416 INFO L225 Difference]: With dead ends: 120833 [2021-06-05 04:01:12,416 INFO L226 Difference]: Without dead ends: 120798 [2021-06-05 04:01:12,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:01:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120798 states. [2021-06-05 04:01:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120798 to 77283. [2021-06-05 04:01:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77283 states, 77282 states have (on average 3.9678320954426645) internal successors, (306642), 77282 states have internal predecessors, (306642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77283 states to 77283 states and 306642 transitions. [2021-06-05 04:01:15,052 INFO L78 Accepts]: Start accepts. Automaton has 77283 states and 306642 transitions. Word has length 25 [2021-06-05 04:01:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:15,052 INFO L482 AbstractCegarLoop]: Abstraction has 77283 states and 306642 transitions. [2021-06-05 04:01:15,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 77283 states and 306642 transitions. [2021-06-05 04:01:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:15,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:15,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:15,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:15,383 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash 650785256, now seen corresponding path program 108 times [2021-06-05 04:01:15,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:15,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378417844] [2021-06-05 04:01:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:15,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378417844] [2021-06-05 04:01:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378417844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780631461] [2021-06-05 04:01:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:15,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:01:15,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:01:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780631461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:15,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:01:15,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060939840] [2021-06-05 04:01:15,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:01:15,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:01:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:01:15,540 INFO L87 Difference]: Start difference. First operand 77283 states and 306642 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:17,749 INFO L93 Difference]: Finished difference Result 101728 states and 389754 transitions. [2021-06-05 04:01:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:01:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:18,050 INFO L225 Difference]: With dead ends: 101728 [2021-06-05 04:01:18,050 INFO L226 Difference]: Without dead ends: 101693 [2021-06-05 04:01:18,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=1024, Invalid=3806, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:01:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101693 states. [2021-06-05 04:01:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101693 to 76534. [2021-06-05 04:01:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76534 states, 76533 states have (on average 3.9670338285445492) internal successors, (303609), 76533 states have internal predecessors, (303609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76534 states to 76534 states and 303609 transitions. [2021-06-05 04:01:20,585 INFO L78 Accepts]: Start accepts. Automaton has 76534 states and 303609 transitions. Word has length 25 [2021-06-05 04:01:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:20,585 INFO L482 AbstractCegarLoop]: Abstraction has 76534 states and 303609 transitions. [2021-06-05 04:01:20,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 76534 states and 303609 transitions. [2021-06-05 04:01:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:20,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:20,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:20,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:20,921 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1063817676, now seen corresponding path program 45 times [2021-06-05 04:01:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:20,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826613795] [2021-06-05 04:01:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:20,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:20,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826613795] [2021-06-05 04:01:20,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826613795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:20,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742062571] [2021-06-05 04:01:20,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:20,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:01:20,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:20,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742062571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440644000] [2021-06-05 04:01:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:21,092 INFO L87 Difference]: Start difference. First operand 76534 states and 303609 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:22,929 INFO L93 Difference]: Finished difference Result 79322 states and 310971 transitions. [2021-06-05 04:01:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 04:01:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:23,155 INFO L225 Difference]: With dead ends: 79322 [2021-06-05 04:01:23,156 INFO L226 Difference]: Without dead ends: 79310 [2021-06-05 04:01:23,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=938, Invalid=2602, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 04:01:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79310 states. [2021-06-05 04:01:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79310 to 76812. [2021-06-05 04:01:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76812 states, 76811 states have (on average 3.9637812292510186) internal successors, (304462), 76811 states have internal predecessors, (304462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76812 states to 76812 states and 304462 transitions. [2021-06-05 04:01:24,869 INFO L78 Accepts]: Start accepts. Automaton has 76812 states and 304462 transitions. Word has length 25 [2021-06-05 04:01:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:24,870 INFO L482 AbstractCegarLoop]: Abstraction has 76812 states and 304462 transitions. [2021-06-05 04:01:24,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76812 states and 304462 transitions. [2021-06-05 04:01:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:25,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:25,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:25,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 04:01:25,204 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -631795252, now seen corresponding path program 46 times [2021-06-05 04:01:25,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:25,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269592555] [2021-06-05 04:01:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:25,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269592555] [2021-06-05 04:01:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269592555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007650709] [2021-06-05 04:01:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:25,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:25,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007650709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:25,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:25,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:01:25,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539062085] [2021-06-05 04:01:25,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:01:25,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:25,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:01:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:25,446 INFO L87 Difference]: Start difference. First operand 76812 states and 304462 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:27,267 INFO L93 Difference]: Finished difference Result 78682 states and 309209 transitions. [2021-06-05 04:01:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:01:27,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:27,486 INFO L225 Difference]: With dead ends: 78682 [2021-06-05 04:01:27,486 INFO L226 Difference]: Without dead ends: 78661 [2021-06-05 04:01:27,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 871.7ms TimeCoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:01:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78661 states. [2021-06-05 04:01:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78661 to 76682. [2021-06-05 04:01:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76682 states, 76681 states have (on average 3.9649848071882214) internal successors, (304039), 76681 states have internal predecessors, (304039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76682 states to 76682 states and 304039 transitions. [2021-06-05 04:01:29,801 INFO L78 Accepts]: Start accepts. Automaton has 76682 states and 304039 transitions. Word has length 25 [2021-06-05 04:01:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:29,801 INFO L482 AbstractCegarLoop]: Abstraction has 76682 states and 304039 transitions. [2021-06-05 04:01:29,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 76682 states and 304039 transitions. [2021-06-05 04:01:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:29,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:29,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:30,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 04:01:30,134 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1261594988, now seen corresponding path program 47 times [2021-06-05 04:01:30,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:30,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895459299] [2021-06-05 04:01:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:30,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895459299] [2021-06-05 04:01:30,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895459299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201090007] [2021-06-05 04:01:30,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:30,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:01:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201090007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:30,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:01:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541726421] [2021-06-05 04:01:30,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:01:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:01:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:30,298 INFO L87 Difference]: Start difference. First operand 76682 states and 304039 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:31,393 INFO L93 Difference]: Finished difference Result 78312 states and 308349 transitions. [2021-06-05 04:01:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:01:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:32,023 INFO L225 Difference]: With dead ends: 78312 [2021-06-05 04:01:32,024 INFO L226 Difference]: Without dead ends: 78270 [2021-06-05 04:01:32,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:01:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78270 states. [2021-06-05 04:01:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78270 to 76682. [2021-06-05 04:01:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76682 states, 76681 states have (on average 3.9649326430276077) internal successors, (304035), 76681 states have internal predecessors, (304035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76682 states to 76682 states and 304035 transitions. [2021-06-05 04:01:33,721 INFO L78 Accepts]: Start accepts. Automaton has 76682 states and 304035 transitions. Word has length 25 [2021-06-05 04:01:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:33,721 INFO L482 AbstractCegarLoop]: Abstraction has 76682 states and 304035 transitions. [2021-06-05 04:01:33,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 76682 states and 304035 transitions. [2021-06-05 04:01:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:33,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:33,862 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:34,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 04:01:34,063 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -938636140, now seen corresponding path program 48 times [2021-06-05 04:01:34,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:34,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470523473] [2021-06-05 04:01:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:34,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470523473] [2021-06-05 04:01:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470523473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637096234] [2021-06-05 04:01:34,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:34,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:01:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637096234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050964035] [2021-06-05 04:01:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:34,236 INFO L87 Difference]: Start difference. First operand 76682 states and 304035 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:35,707 INFO L93 Difference]: Finished difference Result 79167 states and 310773 transitions. [2021-06-05 04:01:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:01:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:35,919 INFO L225 Difference]: With dead ends: 79167 [2021-06-05 04:01:35,919 INFO L226 Difference]: Without dead ends: 79093 [2021-06-05 04:01:35,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=420, Invalid=1472, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:01:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79093 states. [2021-06-05 04:01:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79093 to 76852. [2021-06-05 04:01:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76852 states, 76851 states have (on average 3.96255091020286) internal successors, (304526), 76851 states have internal predecessors, (304526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76852 states to 76852 states and 304526 transitions. [2021-06-05 04:01:37,892 INFO L78 Accepts]: Start accepts. Automaton has 76852 states and 304526 transitions. Word has length 25 [2021-06-05 04:01:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:37,892 INFO L482 AbstractCegarLoop]: Abstraction has 76852 states and 304526 transitions. [2021-06-05 04:01:37,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76852 states and 304526 transitions. [2021-06-05 04:01:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:38,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:38,031 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:38,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 04:01:38,240 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:38,240 INFO L82 PathProgramCache]: Analyzing trace with hash -801593656, now seen corresponding path program 49 times [2021-06-05 04:01:38,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:38,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161936672] [2021-06-05 04:01:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161936672] [2021-06-05 04:01:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161936672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005760115] [2021-06-05 04:01:38,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005760115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786136306] [2021-06-05 04:01:38,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:38,857 INFO L87 Difference]: Start difference. First operand 76852 states and 304526 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:40,387 INFO L93 Difference]: Finished difference Result 82386 states and 320609 transitions. [2021-06-05 04:01:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:01:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:40,612 INFO L225 Difference]: With dead ends: 82386 [2021-06-05 04:01:40,612 INFO L226 Difference]: Without dead ends: 82378 [2021-06-05 04:01:40,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=1095, Invalid=3195, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 04:01:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82378 states. [2021-06-05 04:01:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82378 to 77234. [2021-06-05 04:01:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77234 states, 77233 states have (on average 3.9571556200069917) internal successors, (305623), 77233 states have internal predecessors, (305623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77234 states to 77234 states and 305623 transitions. [2021-06-05 04:01:42,657 INFO L78 Accepts]: Start accepts. Automaton has 77234 states and 305623 transitions. Word has length 25 [2021-06-05 04:01:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 77234 states and 305623 transitions. [2021-06-05 04:01:42,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 77234 states and 305623 transitions. [2021-06-05 04:01:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:42,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:42,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 04:01:42,993 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1797760712, now seen corresponding path program 50 times [2021-06-05 04:01:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230667777] [2021-06-05 04:01:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:43,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230667777] [2021-06-05 04:01:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230667777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376329043] [2021-06-05 04:01:43,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:43,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:43,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:43,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376329043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:43,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:43,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:01:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723592374] [2021-06-05 04:01:43,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:01:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:01:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:43,157 INFO L87 Difference]: Start difference. First operand 77234 states and 305623 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:44,856 INFO L93 Difference]: Finished difference Result 81483 states and 318207 transitions. [2021-06-05 04:01:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:01:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:45,084 INFO L225 Difference]: With dead ends: 81483 [2021-06-05 04:01:45,085 INFO L226 Difference]: Without dead ends: 81462 [2021-06-05 04:01:45,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=701, Invalid=2161, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:01:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81462 states. [2021-06-05 04:01:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81462 to 77196. [2021-06-05 04:01:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77196 states, 77195 states have (on average 3.95738065936913) internal successors, (305490), 77195 states have internal predecessors, (305490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77196 states to 77196 states and 305490 transitions. [2021-06-05 04:01:47,527 INFO L78 Accepts]: Start accepts. Automaton has 77196 states and 305490 transitions. Word has length 25 [2021-06-05 04:01:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:47,528 INFO L482 AbstractCegarLoop]: Abstraction has 77196 states and 305490 transitions. [2021-06-05 04:01:47,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 77196 states and 305490 transitions. [2021-06-05 04:01:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:47,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:47,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:47,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:47,937 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1167960976, now seen corresponding path program 51 times [2021-06-05 04:01:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:47,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060294539] [2021-06-05 04:01:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:47,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060294539] [2021-06-05 04:01:47,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060294539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830923507] [2021-06-05 04:01:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:47,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:01:47,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:48,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830923507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:48,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:48,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:48,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637686360] [2021-06-05 04:01:48,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:48,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:48,105 INFO L87 Difference]: Start difference. First operand 77196 states and 305490 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:49,379 INFO L93 Difference]: Finished difference Result 81233 states and 317500 transitions. [2021-06-05 04:01:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:01:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:49,630 INFO L225 Difference]: With dead ends: 81233 [2021-06-05 04:01:49,630 INFO L226 Difference]: Without dead ends: 81170 [2021-06-05 04:01:49,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=677, Invalid=2293, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 04:01:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81170 states. [2021-06-05 04:01:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81170 to 76905. [2021-06-05 04:01:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76905 states, 76904 states have (on average 3.9601711224383647) internal successors, (304553), 76904 states have internal predecessors, (304553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76905 states to 76905 states and 304553 transitions. [2021-06-05 04:01:51,864 INFO L78 Accepts]: Start accepts. Automaton has 76905 states and 304553 transitions. Word has length 25 [2021-06-05 04:01:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:51,864 INFO L482 AbstractCegarLoop]: Abstraction has 76905 states and 304553 transitions. [2021-06-05 04:01:51,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 76905 states and 304553 transitions. [2021-06-05 04:01:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:52,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:52,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:52,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 04:01:52,212 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1279246648, now seen corresponding path program 52 times [2021-06-05 04:01:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:52,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443232719] [2021-06-05 04:01:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:52,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443232719] [2021-06-05 04:01:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443232719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191889850] [2021-06-05 04:01:52,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:52,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191889850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:52,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:52,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:52,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773598775] [2021-06-05 04:01:52,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:52,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:52,378 INFO L87 Difference]: Start difference. First operand 76905 states and 304553 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:54,137 INFO L93 Difference]: Finished difference Result 80828 states and 316179 transitions. [2021-06-05 04:01:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:01:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:54,355 INFO L225 Difference]: With dead ends: 80828 [2021-06-05 04:01:54,355 INFO L226 Difference]: Without dead ends: 80820 [2021-06-05 04:01:54,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 756.2ms TimeCoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:01:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80820 states. [2021-06-05 04:01:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80820 to 77177. [2021-06-05 04:01:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77177 states, 77176 states have (on average 3.9595729242251476) internal successors, (305584), 77176 states have internal predecessors, (305584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77177 states to 77177 states and 305584 transitions. [2021-06-05 04:01:56,778 INFO L78 Accepts]: Start accepts. Automaton has 77177 states and 305584 transitions. Word has length 25 [2021-06-05 04:01:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 77177 states and 305584 transitions. [2021-06-05 04:01:56,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 77177 states and 305584 transitions. [2021-06-05 04:01:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:01:56,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:56,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:57,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:57,130 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1446983368, now seen corresponding path program 53 times [2021-06-05 04:01:57,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:57,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185842423] [2021-06-05 04:01:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:57,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185842423] [2021-06-05 04:01:57,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185842423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259107203] [2021-06-05 04:01:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:57,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:01:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:01:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:57,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259107203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:57,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:57,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:01:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307913479] [2021-06-05 04:01:57,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:01:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:57,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:01:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:57,300 INFO L87 Difference]: Start difference. First operand 77177 states and 305584 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:59,445 INFO L93 Difference]: Finished difference Result 82141 states and 319979 transitions. [2021-06-05 04:01:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 04:01:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:01:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:59,676 INFO L225 Difference]: With dead ends: 82141 [2021-06-05 04:01:59,677 INFO L226 Difference]: Without dead ends: 82133 [2021-06-05 04:01:59,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=1404, Invalid=4758, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 04:01:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82133 states. [2021-06-05 04:02:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82133 to 77489. [2021-06-05 04:02:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77489 states, 77488 states have (on average 3.9567933099318604) internal successors, (306604), 77488 states have internal predecessors, (306604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77489 states to 77489 states and 306604 transitions. [2021-06-05 04:02:01,513 INFO L78 Accepts]: Start accepts. Automaton has 77489 states and 306604 transitions. Word has length 25 [2021-06-05 04:02:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:01,513 INFO L482 AbstractCegarLoop]: Abstraction has 77489 states and 306604 transitions. [2021-06-05 04:02:01,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 77489 states and 306604 transitions. [2021-06-05 04:02:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:01,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:01,651 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:01,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:01,851 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1320107720, now seen corresponding path program 54 times [2021-06-05 04:02:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:01,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148436026] [2021-06-05 04:02:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:01,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148436026] [2021-06-05 04:02:01,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148436026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192025291] [2021-06-05 04:02:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:01,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:02:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:02:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:02,326 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 04:02:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:02,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192025291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:02,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:02,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:02:02,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040567369] [2021-06-05 04:02:02,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:02,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:02,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:02,444 INFO L87 Difference]: Start difference. First operand 77489 states and 306604 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:03,875 INFO L93 Difference]: Finished difference Result 81125 states and 317212 transitions. [2021-06-05 04:02:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:02:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:04,095 INFO L225 Difference]: With dead ends: 81125 [2021-06-05 04:02:04,095 INFO L226 Difference]: Without dead ends: 81104 [2021-06-05 04:02:04,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:02:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81104 states. [2021-06-05 04:02:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81104 to 77231. [2021-06-05 04:02:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77231 states, 77230 states have (on average 3.958319305969183) internal successors, (305701), 77230 states have internal predecessors, (305701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77231 states to 77231 states and 305701 transitions. [2021-06-05 04:02:06,526 INFO L78 Accepts]: Start accepts. Automaton has 77231 states and 305701 transitions. Word has length 25 [2021-06-05 04:02:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:06,526 INFO L482 AbstractCegarLoop]: Abstraction has 77231 states and 305701 transitions. [2021-06-05 04:02:06,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 77231 states and 305701 transitions. [2021-06-05 04:02:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:06,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:06,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:06,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:06,861 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash 252961740, now seen corresponding path program 55 times [2021-06-05 04:02:06,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:06,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581114114] [2021-06-05 04:02:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:06,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:06,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581114114] [2021-06-05 04:02:06,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581114114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:06,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861616053] [2021-06-05 04:02:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:02:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:07,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861616053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:07,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:07,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:02:07,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655634625] [2021-06-05 04:02:07,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:07,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:07,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:07,045 INFO L87 Difference]: Start difference. First operand 77231 states and 305701 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:09,078 INFO L93 Difference]: Finished difference Result 89374 states and 342820 transitions. [2021-06-05 04:02:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 04:02:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:09,310 INFO L225 Difference]: With dead ends: 89374 [2021-06-05 04:02:09,310 INFO L226 Difference]: Without dead ends: 89366 [2021-06-05 04:02:09,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=1068, Invalid=2964, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:02:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89366 states. [2021-06-05 04:02:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89366 to 77056. [2021-06-05 04:02:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77056 states, 77055 states have (on average 3.9589513983518265) internal successors, (305057), 77055 states have internal predecessors, (305057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77056 states to 77056 states and 305057 transitions. [2021-06-05 04:02:11,647 INFO L78 Accepts]: Start accepts. Automaton has 77056 states and 305057 transitions. Word has length 25 [2021-06-05 04:02:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:11,647 INFO L482 AbstractCegarLoop]: Abstraction has 77056 states and 305057 transitions. [2021-06-05 04:02:11,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 77056 states and 305057 transitions. [2021-06-05 04:02:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:11,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:11,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:11,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 04:02:11,975 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1221820392, now seen corresponding path program 109 times [2021-06-05 04:02:11,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:11,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714213206] [2021-06-05 04:02:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:12,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:12,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714213206] [2021-06-05 04:02:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714213206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:12,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000981541] [2021-06-05 04:02:12,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:02:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000981541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:12,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:12,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:02:12,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582865256] [2021-06-05 04:02:12,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:12,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:12,124 INFO L87 Difference]: Start difference. First operand 77056 states and 305057 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:14,777 INFO L93 Difference]: Finished difference Result 141677 states and 539407 transitions. [2021-06-05 04:02:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 04:02:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:15,193 INFO L225 Difference]: With dead ends: 141677 [2021-06-05 04:02:15,193 INFO L226 Difference]: Without dead ends: 141663 [2021-06-05 04:02:15,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 1282.4ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 04:02:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141663 states. [2021-06-05 04:02:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141663 to 86321. [2021-06-05 04:02:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86321 states, 86320 states have (on average 3.969439295644115) internal successors, (342642), 86320 states have internal predecessors, (342642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86321 states to 86321 states and 342642 transitions. [2021-06-05 04:02:18,178 INFO L78 Accepts]: Start accepts. Automaton has 86321 states and 342642 transitions. Word has length 25 [2021-06-05 04:02:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:18,178 INFO L482 AbstractCegarLoop]: Abstraction has 86321 states and 342642 transitions. [2021-06-05 04:02:18,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 86321 states and 342642 transitions. [2021-06-05 04:02:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:18,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:18,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:18,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 04:02:18,530 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash -898121568, now seen corresponding path program 110 times [2021-06-05 04:02:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299161016] [2021-06-05 04:02:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:18,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299161016] [2021-06-05 04:02:18,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299161016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353193471] [2021-06-05 04:02:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:18,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:18,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:02:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:19,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353193471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:19,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:19,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:02:19,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717871824] [2021-06-05 04:02:19,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:19,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:19,117 INFO L87 Difference]: Start difference. First operand 86321 states and 342642 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:21,917 INFO L93 Difference]: Finished difference Result 126513 states and 485679 transitions. [2021-06-05 04:02:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 04:02:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:22,277 INFO L225 Difference]: With dead ends: 126513 [2021-06-05 04:02:22,277 INFO L226 Difference]: Without dead ends: 126455 [2021-06-05 04:02:22,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 1718.0ms TimeCoverageRelationStatistics Valid=1686, Invalid=6146, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 04:02:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126455 states. [2021-06-05 04:02:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126455 to 78711. [2021-06-05 04:02:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78711 states, 78710 states have (on average 3.963613263880066) internal successors, (311976), 78710 states have internal predecessors, (311976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78711 states to 78711 states and 311976 transitions. [2021-06-05 04:02:24,908 INFO L78 Accepts]: Start accepts. Automaton has 78711 states and 311976 transitions. Word has length 25 [2021-06-05 04:02:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:24,908 INFO L482 AbstractCegarLoop]: Abstraction has 78711 states and 311976 transitions. [2021-06-05 04:02:24,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 78711 states and 311976 transitions. [2021-06-05 04:02:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:25,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:25,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:25,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 04:02:25,246 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash 369349092, now seen corresponding path program 111 times [2021-06-05 04:02:25,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:25,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414781798] [2021-06-05 04:02:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:25,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:25,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414781798] [2021-06-05 04:02:25,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414781798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:25,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520545845] [2021-06-05 04:02:25,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:02:25,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:02:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520545845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:25,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:25,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:02:25,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794474417] [2021-06-05 04:02:25,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:25,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:25,400 INFO L87 Difference]: Start difference. First operand 78711 states and 311976 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:26,696 INFO L93 Difference]: Finished difference Result 88246 states and 345409 transitions. [2021-06-05 04:02:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:02:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:27,013 INFO L225 Difference]: With dead ends: 88246 [2021-06-05 04:02:27,013 INFO L226 Difference]: Without dead ends: 88239 [2021-06-05 04:02:27,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:02:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88239 states. [2021-06-05 04:02:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88239 to 78612. [2021-06-05 04:02:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78612 states, 78611 states have (on average 3.9635801605373295) internal successors, (311581), 78611 states have internal predecessors, (311581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78612 states to 78612 states and 311581 transitions. [2021-06-05 04:02:28,876 INFO L78 Accepts]: Start accepts. Automaton has 78612 states and 311581 transitions. Word has length 25 [2021-06-05 04:02:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:28,876 INFO L482 AbstractCegarLoop]: Abstraction has 78612 states and 311581 transitions. [2021-06-05 04:02:28,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 78612 states and 311581 transitions. [2021-06-05 04:02:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:02:29,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:29,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:29,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:02:29,216 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash 24251820, now seen corresponding path program 112 times [2021-06-05 04:02:29,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:29,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96732766] [2021-06-05 04:02:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:29,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96732766] [2021-06-05 04:02:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96732766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966020444] [2021-06-05 04:02:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:29,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:29,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:02:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:29,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966020444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:29,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:02:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286625157] [2021-06-05 04:02:29,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:29,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:29,385 INFO L87 Difference]: Start difference. First operand 78612 states and 311581 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:30,326 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-06-05 04:02:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:31,616 INFO L93 Difference]: Finished difference Result 113139 states and 434013 transitions. [2021-06-05 04:02:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:02:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:02:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:31,937 INFO L225 Difference]: With dead ends: 113139 [2021-06-05 04:02:31,937 INFO L226 Difference]: Without dead ends: 113111 [2021-06-05 04:02:31,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1271.2ms TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 04:02:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113111 states. [2021-06-05 04:02:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113111 to 83397. [2021-06-05 04:02:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83397 states, 83396 states have (on average 3.962827953379059) internal successors, (330484), 83396 states have internal predecessors, (330484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83397 states to 83397 states and 330484 transitions. [2021-06-05 04:02:34,491 INFO L78 Accepts]: Start accepts. Automaton has 83397 states and 330484 transitions. Word has length 25 [2021-06-05 04:02:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:34,491 INFO L482 AbstractCegarLoop]: Abstraction has 83397 states and 330484 transitions. [2021-06-05 04:02:34,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 83397 states and 330484 transitions. [2021-06-05 04:02:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:02:34,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:34,649 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:34,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 04:02:34,853 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash -821290236, now seen corresponding path program 59 times [2021-06-05 04:02:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:34,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313821899] [2021-06-05 04:02:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:34,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:34,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313821899] [2021-06-05 04:02:34,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313821899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:34,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427899858] [2021-06-05 04:02:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:34,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:02:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:34,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:02:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427899858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:35,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:35,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 04:02:35,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904338810] [2021-06-05 04:02:35,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:35,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:35,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:35,100 INFO L87 Difference]: Start difference. First operand 83397 states and 330484 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:36,362 INFO L93 Difference]: Finished difference Result 103885 states and 410889 transitions. [2021-06-05 04:02:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:02:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:36,677 INFO L225 Difference]: With dead ends: 103885 [2021-06-05 04:02:36,677 INFO L226 Difference]: Without dead ends: 103855 [2021-06-05 04:02:36,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103855 states. [2021-06-05 04:02:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103855 to 101640. [2021-06-05 04:02:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101640 states, 101639 states have (on average 3.9752949163214906) internal successors, (404045), 101639 states have internal predecessors, (404045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101640 states to 101640 states and 404045 transitions. [2021-06-05 04:02:39,560 INFO L78 Accepts]: Start accepts. Automaton has 101640 states and 404045 transitions. Word has length 27 [2021-06-05 04:02:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:39,560 INFO L482 AbstractCegarLoop]: Abstraction has 101640 states and 404045 transitions. [2021-06-05 04:02:39,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 101640 states and 404045 transitions. [2021-06-05 04:02:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:02:39,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:39,737 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:39,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 04:02:39,937 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1228770302, now seen corresponding path program 60 times [2021-06-05 04:02:39,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:39,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284106304] [2021-06-05 04:02:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:40,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:40,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284106304] [2021-06-05 04:02:40,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284106304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518627170] [2021-06-05 04:02:40,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:40,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:02:40,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:02:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:40,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518627170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:40,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:02:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141556425] [2021-06-05 04:02:40,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:40,159 INFO L87 Difference]: Start difference. First operand 101640 states and 404045 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:41,379 INFO L93 Difference]: Finished difference Result 110527 states and 436932 transitions. [2021-06-05 04:02:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:02:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:41,745 INFO L225 Difference]: With dead ends: 110527 [2021-06-05 04:02:41,745 INFO L226 Difference]: Without dead ends: 110472 [2021-06-05 04:02:41,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:02:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110472 states. [2021-06-05 04:02:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110472 to 107889. [2021-06-05 04:02:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107889 states, 107888 states have (on average 3.973833975975085) internal successors, (428729), 107888 states have internal predecessors, (428729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107889 states to 107889 states and 428729 transitions. [2021-06-05 04:02:44,541 INFO L78 Accepts]: Start accepts. Automaton has 107889 states and 428729 transitions. Word has length 27 [2021-06-05 04:02:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:44,541 INFO L482 AbstractCegarLoop]: Abstraction has 107889 states and 428729 transitions. [2021-06-05 04:02:44,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 107889 states and 428729 transitions. [2021-06-05 04:02:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:02:44,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:44,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:44,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 04:02:44,951 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash -937524992, now seen corresponding path program 113 times [2021-06-05 04:02:44,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:44,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642028958] [2021-06-05 04:02:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:45,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:45,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642028958] [2021-06-05 04:02:45,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642028958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:45,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232260194] [2021-06-05 04:02:45,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:45,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:02:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:45,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:02:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:45,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232260194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:45,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:45,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:02:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977309146] [2021-06-05 04:02:45,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:02:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:02:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:45,152 INFO L87 Difference]: Start difference. First operand 107889 states and 428729 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:46,520 INFO L93 Difference]: Finished difference Result 109872 states and 435027 transitions. [2021-06-05 04:02:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:02:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:46,880 INFO L225 Difference]: With dead ends: 109872 [2021-06-05 04:02:46,880 INFO L226 Difference]: Without dead ends: 109783 [2021-06-05 04:02:46,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109783 states. [2021-06-05 04:02:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109783 to 108791. [2021-06-05 04:02:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108791 states, 108790 states have (on average 3.9699604743083006) internal successors, (431892), 108790 states have internal predecessors, (431892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108791 states to 108791 states and 431892 transitions. [2021-06-05 04:02:49,706 INFO L78 Accepts]: Start accepts. Automaton has 108791 states and 431892 transitions. Word has length 27 [2021-06-05 04:02:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:49,706 INFO L482 AbstractCegarLoop]: Abstraction has 108791 states and 431892 transitions. [2021-06-05 04:02:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 108791 states and 431892 transitions. [2021-06-05 04:02:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:02:49,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:49,913 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:50,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 04:02:50,113 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1974933008, now seen corresponding path program 114 times [2021-06-05 04:02:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:50,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829645467] [2021-06-05 04:02:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:50,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829645467] [2021-06-05 04:02:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829645467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585210922] [2021-06-05 04:02:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:50,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:02:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:02:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:50,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585210922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:50,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:50,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:02:50,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223183303] [2021-06-05 04:02:50,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:50,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:50,352 INFO L87 Difference]: Start difference. First operand 108791 states and 431892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:51,694 INFO L93 Difference]: Finished difference Result 111202 states and 439400 transitions. [2021-06-05 04:02:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:02:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:02:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:52,037 INFO L225 Difference]: With dead ends: 111202 [2021-06-05 04:02:52,037 INFO L226 Difference]: Without dead ends: 111143 [2021-06-05 04:02:52,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111143 states. [2021-06-05 04:02:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111143 to 109527. [2021-06-05 04:02:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 3.965569819038402) internal successors, (434333), 109526 states have internal predecessors, (434333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 434333 transitions. [2021-06-05 04:02:54,896 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 434333 transitions. Word has length 27 [2021-06-05 04:02:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:54,896 INFO L482 AbstractCegarLoop]: Abstraction has 109527 states and 434333 transitions. [2021-06-05 04:02:54,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 434333 transitions. [2021-06-05 04:02:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:02:55,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:55,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:55,316 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1998266096, now seen corresponding path program 115 times [2021-06-05 04:02:55,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:55,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852091403] [2021-06-05 04:02:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:55,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:55,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852091403] [2021-06-05 04:02:55,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852091403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:55,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31441627] [2021-06-05 04:02:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:55,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:02:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31441627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:55,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:55,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:02:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258251355] [2021-06-05 04:02:55,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:55,557 INFO L87 Difference]: Start difference. First operand 109527 states and 434333 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:56,880 INFO L93 Difference]: Finished difference Result 112734 states and 444886 transitions. [2021-06-05 04:02:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:02:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:57,211 INFO L225 Difference]: With dead ends: 112734 [2021-06-05 04:02:57,211 INFO L226 Difference]: Without dead ends: 112682 [2021-06-05 04:02:57,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:02:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112682 states. [2021-06-05 04:02:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112682 to 110080. [2021-06-05 04:02:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110080 states, 110079 states have (on average 3.9630447224266208) internal successors, (436248), 110079 states have internal predecessors, (436248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110080 states to 110080 states and 436248 transitions. [2021-06-05 04:03:00,096 INFO L78 Accepts]: Start accepts. Automaton has 110080 states and 436248 transitions. Word has length 27 [2021-06-05 04:03:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:00,096 INFO L482 AbstractCegarLoop]: Abstraction has 110080 states and 436248 transitions. [2021-06-05 04:03:00,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 110080 states and 436248 transitions. [2021-06-05 04:03:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:00,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:00,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:00,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:00,515 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -265247552, now seen corresponding path program 116 times [2021-06-05 04:03:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:00,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623075183] [2021-06-05 04:03:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:00,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623075183] [2021-06-05 04:03:00,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623075183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410871517] [2021-06-05 04:03:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410871517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568955439] [2021-06-05 04:03:00,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:00,742 INFO L87 Difference]: Start difference. First operand 110080 states and 436248 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:02,138 INFO L93 Difference]: Finished difference Result 111354 states and 440255 transitions. [2021-06-05 04:03:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:02,461 INFO L225 Difference]: With dead ends: 111354 [2021-06-05 04:03:02,461 INFO L226 Difference]: Without dead ends: 111324 [2021-06-05 04:03:02,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111324 states. [2021-06-05 04:03:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111324 to 110406. [2021-06-05 04:03:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110406 states, 110405 states have (on average 3.9620216475703094) internal successors, (437427), 110405 states have internal predecessors, (437427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110406 states to 110406 states and 437427 transitions. [2021-06-05 04:03:05,389 INFO L78 Accepts]: Start accepts. Automaton has 110406 states and 437427 transitions. Word has length 27 [2021-06-05 04:03:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:05,389 INFO L482 AbstractCegarLoop]: Abstraction has 110406 states and 437427 transitions. [2021-06-05 04:03:05,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 110406 states and 437427 transitions. [2021-06-05 04:03:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:05,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:05,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:05,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:05,812 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:05,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1302655568, now seen corresponding path program 117 times [2021-06-05 04:03:05,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:05,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759493946] [2021-06-05 04:03:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:05,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:05,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759493946] [2021-06-05 04:03:05,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759493946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:05,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303192543] [2021-06-05 04:03:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:05,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303192543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:06,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:06,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581408472] [2021-06-05 04:03:06,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:06,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:06,027 INFO L87 Difference]: Start difference. First operand 110406 states and 437427 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:07,879 INFO L93 Difference]: Finished difference Result 111948 states and 442166 transitions. [2021-06-05 04:03:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:07,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:08,410 INFO L225 Difference]: With dead ends: 111948 [2021-06-05 04:03:08,410 INFO L226 Difference]: Without dead ends: 111918 [2021-06-05 04:03:08,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111918 states. [2021-06-05 04:03:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111918 to 110463. [2021-06-05 04:03:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110463 states, 110462 states have (on average 3.9619416631963933) internal successors, (437644), 110462 states have internal predecessors, (437644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110463 states to 110463 states and 437644 transitions. [2021-06-05 04:03:11,487 INFO L78 Accepts]: Start accepts. Automaton has 110463 states and 437644 transitions. Word has length 27 [2021-06-05 04:03:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:11,487 INFO L482 AbstractCegarLoop]: Abstraction has 110463 states and 437644 transitions. [2021-06-05 04:03:11,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 110463 states and 437644 transitions. [2021-06-05 04:03:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:11,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:11,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:11,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 04:03:11,892 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1790561516, now seen corresponding path program 118 times [2021-06-05 04:03:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:11,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725092438] [2021-06-05 04:03:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:11,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:11,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725092438] [2021-06-05 04:03:11,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725092438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:11,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219618026] [2021-06-05 04:03:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:11,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219618026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:12,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:12,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:12,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108599712] [2021-06-05 04:03:12,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:12,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:12,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:12,110 INFO L87 Difference]: Start difference. First operand 110463 states and 437644 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:13,346 INFO L93 Difference]: Finished difference Result 112108 states and 442728 transitions. [2021-06-05 04:03:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:13,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:13,726 INFO L225 Difference]: With dead ends: 112108 [2021-06-05 04:03:13,726 INFO L226 Difference]: Without dead ends: 112078 [2021-06-05 04:03:13,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112078 states. [2021-06-05 04:03:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112078 to 110615. [2021-06-05 04:03:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110615 states, 110614 states have (on average 3.961180320755058) internal successors, (438162), 110614 states have internal predecessors, (438162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110615 states to 110615 states and 438162 transitions. [2021-06-05 04:03:16,650 INFO L78 Accepts]: Start accepts. Automaton has 110615 states and 438162 transitions. Word has length 27 [2021-06-05 04:03:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:16,651 INFO L482 AbstractCegarLoop]: Abstraction has 110615 states and 438162 transitions. [2021-06-05 04:03:16,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 110615 states and 438162 transitions. [2021-06-05 04:03:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:16,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:16,856 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:17,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:17,056 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1447877820, now seen corresponding path program 119 times [2021-06-05 04:03:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:17,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496292946] [2021-06-05 04:03:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:17,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:17,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496292946] [2021-06-05 04:03:17,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496292946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:17,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553648233] [2021-06-05 04:03:17,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:17,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:17,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:17,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553648233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:17,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:17,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 04:03:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206614590] [2021-06-05 04:03:17,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:17,279 INFO L87 Difference]: Start difference. First operand 110615 states and 438162 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:18,495 INFO L93 Difference]: Finished difference Result 112949 states and 445764 transitions. [2021-06-05 04:03:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:18,882 INFO L225 Difference]: With dead ends: 112949 [2021-06-05 04:03:18,882 INFO L226 Difference]: Without dead ends: 112905 [2021-06-05 04:03:18,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112905 states. [2021-06-05 04:03:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112905 to 110863. [2021-06-05 04:03:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110863 states, 110862 states have (on average 3.961492666558424) internal successors, (439179), 110862 states have internal predecessors, (439179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110863 states to 110863 states and 439179 transitions. [2021-06-05 04:03:21,683 INFO L78 Accepts]: Start accepts. Automaton has 110863 states and 439179 transitions. Word has length 27 [2021-06-05 04:03:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:21,684 INFO L482 AbstractCegarLoop]: Abstraction has 110863 states and 439179 transitions. [2021-06-05 04:03:21,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 110863 states and 439179 transitions. [2021-06-05 04:03:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:21,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:21,903 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:22,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 04:03:22,103 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1518602116, now seen corresponding path program 120 times [2021-06-05 04:03:22,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:22,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443122011] [2021-06-05 04:03:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:22,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:22,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443122011] [2021-06-05 04:03:22,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443122011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:22,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268989346] [2021-06-05 04:03:22,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:22,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:22,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:22,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268989346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:22,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:22,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:22,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355510572] [2021-06-05 04:03:22,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:22,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:22,338 INFO L87 Difference]: Start difference. First operand 110863 states and 439179 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:23,668 INFO L93 Difference]: Finished difference Result 113182 states and 446302 transitions. [2021-06-05 04:03:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:24,028 INFO L225 Difference]: With dead ends: 113182 [2021-06-05 04:03:24,029 INFO L226 Difference]: Without dead ends: 113094 [2021-06-05 04:03:24,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113094 states. [2021-06-05 04:03:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113094 to 111306. [2021-06-05 04:03:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111306 states, 111305 states have (on average 3.958106104847042) internal successors, (440557), 111305 states have internal predecessors, (440557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111306 states to 111306 states and 440557 transitions. [2021-06-05 04:03:26,846 INFO L78 Accepts]: Start accepts. Automaton has 111306 states and 440557 transitions. Word has length 27 [2021-06-05 04:03:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,846 INFO L482 AbstractCegarLoop]: Abstraction has 111306 states and 440557 transitions. [2021-06-05 04:03:26,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 111306 states and 440557 transitions. [2021-06-05 04:03:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:27,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 04:03:27,263 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1806423744, now seen corresponding path program 121 times [2021-06-05 04:03:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792370221] [2021-06-05 04:03:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792370221] [2021-06-05 04:03:27,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792370221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050200072] [2021-06-05 04:03:27,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050200072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133966482] [2021-06-05 04:03:27,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:27,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:27,461 INFO L87 Difference]: Start difference. First operand 111306 states and 440557 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,790 INFO L93 Difference]: Finished difference Result 114026 states and 448982 transitions. [2021-06-05 04:03:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,135 INFO L225 Difference]: With dead ends: 114026 [2021-06-05 04:03:29,135 INFO L226 Difference]: Without dead ends: 113946 [2021-06-05 04:03:29,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:29,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113946 states. [2021-06-05 04:03:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113946 to 111604. [2021-06-05 04:03:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111604 states, 111603 states have (on average 3.95698144315117) internal successors, (441611), 111603 states have internal predecessors, (441611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111604 states to 111604 states and 441611 transitions. [2021-06-05 04:03:31,963 INFO L78 Accepts]: Start accepts. Automaton has 111604 states and 441611 transitions. Word has length 27 [2021-06-05 04:03:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,963 INFO L482 AbstractCegarLoop]: Abstraction has 111604 states and 441611 transitions. [2021-06-05 04:03:31,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 111604 states and 441611 transitions. [2021-06-05 04:03:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 04:03:32,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,376 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1700606980, now seen corresponding path program 122 times [2021-06-05 04:03:32,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676418263] [2021-06-05 04:03:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676418263] [2021-06-05 04:03:32,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676418263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476215593] [2021-06-05 04:03:32,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:32,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476215593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 04:03:32,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625188170] [2021-06-05 04:03:32,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:32,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:32,612 INFO L87 Difference]: Start difference. First operand 111604 states and 441611 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,017 INFO L93 Difference]: Finished difference Result 115450 states and 454078 transitions. [2021-06-05 04:03:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 04:03:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,352 INFO L225 Difference]: With dead ends: 115450 [2021-06-05 04:03:34,353 INFO L226 Difference]: Without dead ends: 115391 [2021-06-05 04:03:34,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115391 states. [2021-06-05 04:03:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115391 to 112484. [2021-06-05 04:03:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112484 states, 112483 states have (on average 3.953957486909133) internal successors, (444753), 112483 states have internal predecessors, (444753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112484 states to 112484 states and 444753 transitions. [2021-06-05 04:03:37,333 INFO L78 Accepts]: Start accepts. Automaton has 112484 states and 444753 transitions. Word has length 27 [2021-06-05 04:03:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,333 INFO L482 AbstractCegarLoop]: Abstraction has 112484 states and 444753 transitions. [2021-06-05 04:03:37,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 112484 states and 444753 transitions. [2021-06-05 04:03:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:03:37,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,576 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,776 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1221364454, now seen corresponding path program 61 times [2021-06-05 04:03:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783687994] [2021-06-05 04:03:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783687994] [2021-06-05 04:03:37,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783687994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383614222] [2021-06-05 04:03:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383614222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 04:03:38,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372254801] [2021-06-05 04:03:38,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:03:38,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:03:38,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:38,585 INFO L87 Difference]: Start difference. First operand 112484 states and 444753 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,690 INFO L93 Difference]: Finished difference Result 133803 states and 522611 transitions. [2021-06-05 04:03:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:03:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:03:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,077 INFO L225 Difference]: With dead ends: 133803 [2021-06-05 04:03:40,077 INFO L226 Difference]: Without dead ends: 133803 [2021-06-05 04:03:40,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 913.5ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:03:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133803 states. [2021-06-05 04:03:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133803 to 118275. [2021-06-05 04:03:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118275 states, 118274 states have (on average 3.955315623044794) internal successors, (467811), 118274 states have internal predecessors, (467811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118275 states to 118275 states and 467811 transitions. [2021-06-05 04:03:43,931 INFO L78 Accepts]: Start accepts. Automaton has 118275 states and 467811 transitions. Word has length 29 [2021-06-05 04:03:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:43,931 INFO L482 AbstractCegarLoop]: Abstraction has 118275 states and 467811 transitions. [2021-06-05 04:03:43,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 118275 states and 467811 transitions. [2021-06-05 04:03:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:03:44,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:44,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 04:03:44,377 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash -920591248, now seen corresponding path program 123 times [2021-06-05 04:03:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37092729] [2021-06-05 04:03:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37092729] [2021-06-05 04:03:44,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37092729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544002301] [2021-06-05 04:03:44,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544002301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 04:03:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641213705] [2021-06-05 04:03:44,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:44,601 INFO L87 Difference]: Start difference. First operand 118275 states and 467811 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:46,284 INFO L93 Difference]: Finished difference Result 129210 states and 506995 transitions. [2021-06-05 04:03:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:03:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:03:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:46,720 INFO L225 Difference]: With dead ends: 129210 [2021-06-05 04:03:46,720 INFO L226 Difference]: Without dead ends: 129203 [2021-06-05 04:03:46,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:03:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129203 states. [2021-06-05 04:03:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129203 to 118854. [2021-06-05 04:03:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118854 states, 118853 states have (on average 3.953606555997745) internal successors, (469898), 118853 states have internal predecessors, (469898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118854 states to 118854 states and 469898 transitions. [2021-06-05 04:03:49,649 INFO L78 Accepts]: Start accepts. Automaton has 118854 states and 469898 transitions. Word has length 29 [2021-06-05 04:03:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,649 INFO L482 AbstractCegarLoop]: Abstraction has 118854 states and 469898 transitions. [2021-06-05 04:03:49,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 118854 states and 469898 transitions. [2021-06-05 04:03:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:03:49,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,881 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,082 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1451241570, now seen corresponding path program 62 times [2021-06-05 04:03:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145186458] [2021-06-05 04:03:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145186458] [2021-06-05 04:03:50,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145186458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363022129] [2021-06-05 04:03:50,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363022129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:03:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920718377] [2021-06-05 04:03:50,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:03:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:03:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:50,328 INFO L87 Difference]: Start difference. First operand 118854 states and 469898 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,185 INFO L93 Difference]: Finished difference Result 123992 states and 486316 transitions. [2021-06-05 04:03:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:03:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:03:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,549 INFO L225 Difference]: With dead ends: 123992 [2021-06-05 04:03:52,549 INFO L226 Difference]: Without dead ends: 123939 [2021-06-05 04:03:52,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 684.7ms TimeCoverageRelationStatistics Valid=410, Invalid=1846, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:03:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123939 states. [2021-06-05 04:03:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123939 to 119042. [2021-06-05 04:03:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119042 states, 119041 states have (on average 3.9531253937718938) internal successors, (470584), 119041 states have internal predecessors, (470584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119042 states to 119042 states and 470584 transitions. [2021-06-05 04:03:56,124 INFO L78 Accepts]: Start accepts. Automaton has 119042 states and 470584 transitions. Word has length 29 [2021-06-05 04:03:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,124 INFO L482 AbstractCegarLoop]: Abstraction has 119042 states and 470584 transitions. [2021-06-05 04:03:56,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 119042 states and 470584 transitions. [2021-06-05 04:03:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:03:56,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,413 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:56,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2021-06-05 04:03:56,613 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1329566750, now seen corresponding path program 63 times [2021-06-05 04:03:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:56,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127994941] [2021-06-05 04:03:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127994941] [2021-06-05 04:03:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127994941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139604460] [2021-06-05 04:03:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:03:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139604460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:56,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:03:56,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534679143] [2021-06-05 04:03:56,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:03:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:03:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:56,839 INFO L87 Difference]: Start difference. First operand 119042 states and 470584 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:01,962 INFO L93 Difference]: Finished difference Result 146231 states and 560780 transitions. [2021-06-05 04:04:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 04:04:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:02,489 INFO L225 Difference]: With dead ends: 146231 [2021-06-05 04:04:02,489 INFO L226 Difference]: Without dead ends: 146231 [2021-06-05 04:04:02,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12572 ImplicationChecksByTransitivity, 3583.0ms TimeCoverageRelationStatistics Valid=6926, Invalid=21466, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 04:04:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146231 states. [2021-06-05 04:04:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146231 to 126560. [2021-06-05 04:04:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126560 states, 126559 states have (on average 3.9548669000229144) internal successors, (500524), 126559 states have internal predecessors, (500524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126560 states to 126560 states and 500524 transitions. [2021-06-05 04:04:06,583 INFO L78 Accepts]: Start accepts. Automaton has 126560 states and 500524 transitions. Word has length 29 [2021-06-05 04:04:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:06,583 INFO L482 AbstractCegarLoop]: Abstraction has 126560 states and 500524 transitions. [2021-06-05 04:04:06,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126560 states and 500524 transitions. [2021-06-05 04:04:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:06,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:06,827 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,028 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -82100962, now seen corresponding path program 124 times [2021-06-05 04:04:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131041910] [2021-06-05 04:04:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131041910] [2021-06-05 04:04:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131041910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919664475] [2021-06-05 04:04:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919664475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 04:04:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442086446] [2021-06-05 04:04:07,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:07,317 INFO L87 Difference]: Start difference. First operand 126560 states and 500524 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,655 INFO L93 Difference]: Finished difference Result 215685 states and 826250 transitions. [2021-06-05 04:04:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 04:04:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,291 INFO L225 Difference]: With dead ends: 215685 [2021-06-05 04:04:12,291 INFO L226 Difference]: Without dead ends: 215673 [2021-06-05 04:04:12,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 2277.6ms TimeCoverageRelationStatistics Valid=2399, Invalid=10941, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 04:04:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215673 states. [2021-06-05 04:04:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215673 to 165626. [2021-06-05 04:04:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165626 states, 165625 states have (on average 3.9928030188679244) internal successors, (661308), 165625 states have internal predecessors, (661308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165626 states to 165626 states and 661308 transitions. [2021-06-05 04:04:17,804 INFO L78 Accepts]: Start accepts. Automaton has 165626 states and 661308 transitions. Word has length 29 [2021-06-05 04:04:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,804 INFO L482 AbstractCegarLoop]: Abstraction has 165626 states and 661308 transitions. [2021-06-05 04:04:17,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 165626 states and 661308 transitions. [2021-06-05 04:04:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:18,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:18,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:18,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:18,325 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 896456482, now seen corresponding path program 125 times [2021-06-05 04:04:18,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:18,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188931417] [2021-06-05 04:04:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188931417] [2021-06-05 04:04:18,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188931417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653322708] [2021-06-05 04:04:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:18,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653322708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:19,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 04:04:19,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120913353] [2021-06-05 04:04:19,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:19,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:19,273 INFO L87 Difference]: Start difference. First operand 165626 states and 661308 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,745 INFO L93 Difference]: Finished difference Result 240162 states and 908189 transitions. [2021-06-05 04:04:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 04:04:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:23,494 INFO L225 Difference]: With dead ends: 240162 [2021-06-05 04:04:23,495 INFO L226 Difference]: Without dead ends: 240155 [2021-06-05 04:04:23,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 2266.9ms TimeCoverageRelationStatistics Valid=1955, Invalid=7747, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 04:04:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240155 states. [2021-06-05 04:04:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240155 to 142026. [2021-06-05 04:04:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142026 states, 142025 states have (on average 3.974328463298715) internal successors, (564454), 142025 states have internal predecessors, (564454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142026 states to 142026 states and 564454 transitions. [2021-06-05 04:04:28,796 INFO L78 Accepts]: Start accepts. Automaton has 142026 states and 564454 transitions. Word has length 29 [2021-06-05 04:04:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:28,796 INFO L482 AbstractCegarLoop]: Abstraction has 142026 states and 564454 transitions. [2021-06-05 04:04:28,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 142026 states and 564454 transitions. [2021-06-05 04:04:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:29,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:29,078 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:29,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,280 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:29,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1202691102, now seen corresponding path program 64 times [2021-06-05 04:04:29,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:29,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394277710] [2021-06-05 04:04:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:29,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394277710] [2021-06-05 04:04:29,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394277710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720160742] [2021-06-05 04:04:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720160742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:04:30,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546101929] [2021-06-05 04:04:30,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:04:30,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:04:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:30,194 INFO L87 Difference]: Start difference. First operand 142026 states and 564454 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,589 INFO L93 Difference]: Finished difference Result 157218 states and 610711 transitions. [2021-06-05 04:04:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 04:04:33,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:34,068 INFO L225 Difference]: With dead ends: 157218 [2021-06-05 04:04:34,068 INFO L226 Difference]: Without dead ends: 157183 [2021-06-05 04:04:34,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 2050.8ms TimeCoverageRelationStatistics Valid=3281, Invalid=9601, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:04:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157183 states. [2021-06-05 04:04:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157183 to 141438. [2021-06-05 04:04:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141438 states, 141437 states have (on average 3.9775589131556806) internal successors, (562574), 141437 states have internal predecessors, (562574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141438 states to 141438 states and 562574 transitions. [2021-06-05 04:04:38,359 INFO L78 Accepts]: Start accepts. Automaton has 141438 states and 562574 transitions. Word has length 29 [2021-06-05 04:04:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:38,359 INFO L482 AbstractCegarLoop]: Abstraction has 141438 states and 562574 transitions. [2021-06-05 04:04:38,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 141438 states and 562574 transitions. [2021-06-05 04:04:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:39,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:39,404 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:39,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 04:04:39,621 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash -633583326, now seen corresponding path program 65 times [2021-06-05 04:04:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:39,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748588244] [2021-06-05 04:04:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:39,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748588244] [2021-06-05 04:04:39,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748588244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206121437] [2021-06-05 04:04:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:39,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206121437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:39,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:04:39,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891624704] [2021-06-05 04:04:39,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:04:39,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:39,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:04:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:39,845 INFO L87 Difference]: Start difference. First operand 141438 states and 562574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:42,864 INFO L93 Difference]: Finished difference Result 156501 states and 608867 transitions. [2021-06-05 04:04:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 04:04:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:43,312 INFO L225 Difference]: With dead ends: 156501 [2021-06-05 04:04:43,313 INFO L226 Difference]: Without dead ends: 156417 [2021-06-05 04:04:43,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 1587.3ms TimeCoverageRelationStatistics Valid=2343, Invalid=7163, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 04:04:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156417 states. [2021-06-05 04:04:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156417 to 141164. [2021-06-05 04:04:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141164 states, 141163 states have (on average 3.97604188066278) internal successors, (561270), 141163 states have internal predecessors, (561270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141164 states to 141164 states and 561270 transitions. [2021-06-05 04:04:47,446 INFO L78 Accepts]: Start accepts. Automaton has 141164 states and 561270 transitions. Word has length 29 [2021-06-05 04:04:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 141164 states and 561270 transitions. [2021-06-05 04:04:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 141164 states and 561270 transitions. [2021-06-05 04:04:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:48,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:48,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:48,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 04:04:48,741 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 22459578, now seen corresponding path program 126 times [2021-06-05 04:04:48,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:48,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619272624] [2021-06-05 04:04:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619272624] [2021-06-05 04:04:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619272624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871244568] [2021-06-05 04:04:48,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:48,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:04:48,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871244568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:48,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:48,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 04:04:48,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262166222] [2021-06-05 04:04:48,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:48,955 INFO L87 Difference]: Start difference. First operand 141164 states and 561270 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:52,416 INFO L93 Difference]: Finished difference Result 203541 states and 778217 transitions. [2021-06-05 04:04:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 04:04:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:04:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:53,627 INFO L225 Difference]: With dead ends: 203541 [2021-06-05 04:04:53,627 INFO L226 Difference]: Without dead ends: 203513 [2021-06-05 04:04:53,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 1504.6ms TimeCoverageRelationStatistics Valid=2112, Invalid=9444, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 04:04:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203513 states. [2021-06-05 04:04:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203513 to 145059. [2021-06-05 04:04:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145059 states, 145058 states have (on average 3.9755890747149416) internal successors, (576691), 145058 states have internal predecessors, (576691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145059 states to 145059 states and 576691 transitions. [2021-06-05 04:04:58,323 INFO L78 Accepts]: Start accepts. Automaton has 145059 states and 576691 transitions. Word has length 29 [2021-06-05 04:04:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:58,323 INFO L482 AbstractCegarLoop]: Abstraction has 145059 states and 576691 transitions. [2021-06-05 04:04:58,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 145059 states and 576691 transitions. [2021-06-05 04:04:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:04:58,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:58,636 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:58,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 04:04:58,841 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1855414306, now seen corresponding path program 66 times [2021-06-05 04:04:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:58,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143478970] [2021-06-05 04:04:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:58,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:58,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143478970] [2021-06-05 04:04:58,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143478970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:58,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950832682] [2021-06-05 04:04:58,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:58,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:59,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950832682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:59,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:59,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:04:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000240262] [2021-06-05 04:04:59,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:04:59,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:04:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:59,062 INFO L87 Difference]: Start difference. First operand 145059 states and 576691 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:02,058 INFO L93 Difference]: Finished difference Result 161332 states and 627053 transitions. [2021-06-05 04:05:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 04:05:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:05:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:03,028 INFO L225 Difference]: With dead ends: 161332 [2021-06-05 04:05:03,029 INFO L226 Difference]: Without dead ends: 161227 [2021-06-05 04:05:03,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1409.2ms TimeCoverageRelationStatistics Valid=1982, Invalid=6390, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 04:05:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161227 states. [2021-06-05 04:05:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161227 to 146230. [2021-06-05 04:05:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146230 states, 146229 states have (on average 3.967995404468334) internal successors, (580236), 146229 states have internal predecessors, (580236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146230 states to 146230 states and 580236 transitions. [2021-06-05 04:05:08,219 INFO L78 Accepts]: Start accepts. Automaton has 146230 states and 580236 transitions. Word has length 29 [2021-06-05 04:05:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:08,220 INFO L482 AbstractCegarLoop]: Abstraction has 146230 states and 580236 transitions. [2021-06-05 04:05:08,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 146230 states and 580236 transitions. [2021-06-05 04:05:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:05:08,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:08,607 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:08,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 04:05:08,831 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash -700559262, now seen corresponding path program 67 times [2021-06-05 04:05:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:08,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656758477] [2021-06-05 04:05:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:08,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656758477] [2021-06-05 04:05:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656758477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622659276] [2021-06-05 04:05:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:05:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:09,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622659276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:09,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:09,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:05:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577779151] [2021-06-05 04:05:09,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:05:09,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:09,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:05:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:09,149 INFO L87 Difference]: Start difference. First operand 146230 states and 580236 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:11,771 INFO L93 Difference]: Finished difference Result 151525 states and 597028 transitions. [2021-06-05 04:05:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:05:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:05:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:12,389 INFO L225 Difference]: With dead ends: 151525 [2021-06-05 04:05:12,390 INFO L226 Difference]: Without dead ends: 151472 [2021-06-05 04:05:12,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 984.5ms TimeCoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:05:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151472 states. [2021-06-05 04:05:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151472 to 147173. [2021-06-05 04:05:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147173 states, 147172 states have (on average 3.964599244421493) internal successors, (583478), 147172 states have internal predecessors, (583478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147173 states to 147173 states and 583478 transitions. [2021-06-05 04:05:16,818 INFO L78 Accepts]: Start accepts. Automaton has 147173 states and 583478 transitions. Word has length 29 [2021-06-05 04:05:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:16,818 INFO L482 AbstractCegarLoop]: Abstraction has 147173 states and 583478 transitions. [2021-06-05 04:05:16,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 147173 states and 583478 transitions. [2021-06-05 04:05:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:05:17,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:17,121 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:17,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 04:05:17,322 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2140543774, now seen corresponding path program 68 times [2021-06-05 04:05:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:17,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900361562] [2021-06-05 04:05:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:17,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900361562] [2021-06-05 04:05:17,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900361562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466178093] [2021-06-05 04:05:17,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:17,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:05:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466178093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:17,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:05:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070156230] [2021-06-05 04:05:17,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:05:17,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:05:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:17,596 INFO L87 Difference]: Start difference. First operand 147173 states and 583478 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:20,149 INFO L93 Difference]: Finished difference Result 154103 states and 604819 transitions. [2021-06-05 04:05:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 04:05:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:05:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:21,040 INFO L225 Difference]: With dead ends: 154103 [2021-06-05 04:05:21,040 INFO L226 Difference]: Without dead ends: 153998 [2021-06-05 04:05:21,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1686.8ms TimeCoverageRelationStatistics Valid=863, Invalid=3693, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 04:05:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153998 states. [2021-06-05 04:05:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153998 to 148515. [2021-06-05 04:05:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148515 states, 148514 states have (on average 3.9585964959532434) internal successors, (587907), 148514 states have internal predecessors, (587907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148515 states to 148515 states and 587907 transitions. [2021-06-05 04:05:25,239 INFO L78 Accepts]: Start accepts. Automaton has 148515 states and 587907 transitions. Word has length 29 [2021-06-05 04:05:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:25,239 INFO L482 AbstractCegarLoop]: Abstraction has 148515 states and 587907 transitions. [2021-06-05 04:05:25,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 148515 states and 587907 transitions. [2021-06-05 04:05:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:05:25,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:25,739 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:25,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,939 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1344516894, now seen corresponding path program 69 times [2021-06-05 04:05:25,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:25,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673583227] [2021-06-05 04:05:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673583227] [2021-06-05 04:05:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673583227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972792936] [2021-06-05 04:05:25,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:26,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:26,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:05:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:26,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972792936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:26,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:26,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 04:05:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109152096] [2021-06-05 04:05:26,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:05:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:05:26,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:26,204 INFO L87 Difference]: Start difference. First operand 148515 states and 587907 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 04:05:27,033 WARN L222 SmtUtils]: Removed 10 from assertion stack [2021-06-05 04:05:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:05:27,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:27,234 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:05:27,235 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:05:27,237 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:05:27,237 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:05:27 BasicIcfg [2021-06-05 04:05:27,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:05:27,238 INFO L168 Benchmark]: Toolchain (without parser) took 717280.82 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 354.9 MB in the beginning and 11.7 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.3 GB. Max. memory is 16.0 GB. [2021-06-05 04:05:27,238 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 375.4 MB. Free memory was 356.0 MB in the beginning and 356.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:05:27,238 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.43 ms. Allocated memory is still 375.4 MB. Free memory was 354.8 MB in the beginning and 353.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:05:27,238 INFO L168 Benchmark]: Boogie Preprocessor took 17.45 ms. Allocated memory is still 375.4 MB. Free memory was 353.4 MB in the beginning and 352.4 MB in the end (delta: 987.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:05:27,238 INFO L168 Benchmark]: RCFGBuilder took 258.71 ms. Allocated memory is still 375.4 MB. Free memory was 352.3 MB in the beginning and 339.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 04:05:27,238 INFO L168 Benchmark]: TraceAbstraction took 716975.00 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.3 MB in the beginning and 11.7 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-06-05 04:05:27,239 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 0.15 ms. Allocated memory is still 375.4 MB. Free memory was 356.0 MB in the beginning and 356.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.43 ms. Allocated memory is still 375.4 MB. Free memory was 354.8 MB in the beginning and 353.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.45 ms. Allocated memory is still 375.4 MB. Free memory was 353.4 MB in the beginning and 352.4 MB in the end (delta: 987.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 258.71 ms. Allocated memory is still 375.4 MB. Free memory was 352.3 MB in the beginning and 339.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 716975.00 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.3 MB in the beginning and 11.7 GB in the end (delta: -11.4 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: 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 difference of abstraction (148515states) and FLOYD_HOARE automaton (currently 37 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 4ms.. - TimeoutResultAtElement [Line: 56]: 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 difference of abstraction (148515states) and FLOYD_HOARE automaton (currently 37 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 4ms.. - TimeoutResultAtElement [Line: 56]: 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 difference of abstraction (148515states) and FLOYD_HOARE automaton (currently 37 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 4ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (148515states) and FLOYD_HOARE automaton (currently 37 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 716845.0ms, OverallIterations: 262, TraceHistogramMax: 4, EmptinessCheckTime: 21180.3ms, AutomataDifference: 325291.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11050 SDtfs, 73580 SDslu, 89795 SDs, 0 SdLazy, 122019 SolverSat, 13843 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61785.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15863 GetRequests, 4717 SyntacticMatches, 5 SemanticMatches, 11140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203015 ImplicationChecksByTransitivity, 163004.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=165626occurred in iteration=254, InterpolantAutomatonStates: 10044, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 265308.9ms AutomataMinimizationTime, 261 MinimizatonAttempts, 2081130 StatesRemovedByMinimization, 261 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 848.6ms SsaConstructionTime, 2400.3ms SatisfiabilityAnalysisTime, 43854.0ms InterpolantComputationTime, 12530 NumberOfCodeBlocks, 12523 NumberOfCodeBlocksAsserted, 909 NumberOfCheckSat, 12014 ConstructedInterpolants, 0 QuantifiedInterpolants, 91429 SizeOfPredicates, 1434 NumberOfNonLiveVariables, 18398 ConjunctsInSsa, 2699 ConjunctsInUnsatCore, 516 InterpolantComputations, 8 PerfectInterpolantSequences, 1791/5355 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown