/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:19:45,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:19:45,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:19:45,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:19:45,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:19:45,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:19:45,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:19:45,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:19:45,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:19:45,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:19:45,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:19:45,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:19:45,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:19:45,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:19:45,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:19:45,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:19:45,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 19:19:45,244 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 [2021-08-12 19:19:45,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:19:45,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:19:45,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:19:45,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:19:45,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:19:45,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:19:45,280 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:19:45,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:19:45,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:19:45,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:19:45,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:19:45,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:19:45,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:19:45,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:19:45,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:19:45,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:19:45,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:19:45,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:19:45,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:19:45,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:19:45,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:19:45,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:19:45,284 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:19:45,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:19:45,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:19:45,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:19:45,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:19:45,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:19:45,592 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:19:45,595 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:19:45,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-08-12 19:19:45,596 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-08-12 19:19:45,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:19:45,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:19:45,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:19:45,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:19:45,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:19:45,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:19:45,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:19:45,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:19:45,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:19:45,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/1) ... [2021-08-12 19:19:45,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:19:45,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:19:45,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:19:45,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:19:45,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (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 [2021-08-12 19:19:45,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:19:45,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:19:45,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:19:45,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:19:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:19:45,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:19:45,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:19:45,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:19:45,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:19:45,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:19:45,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:19:45,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:19:45,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:19:45,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:19:45,932 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:19:45,940 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:19:45 BoogieIcfgContainer [2021-08-12 19:19:45,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:19:45,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:19:45,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:19:45,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:19:45,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:19:45" (1/2) ... [2021-08-12 19:19:45,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64460e9c and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:19:45, skipping insertion in model container [2021-08-12 19:19:45,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:19:45" (2/2) ... [2021-08-12 19:19:45,958 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-08-12 19:19:45,962 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:19:45,962 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:19:45,963 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:19:46,025 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 19:19:46,039 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 19:19:46,054 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:19:46,054 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:19:46,054 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:19:46,054 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:19:46,054 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:19:46,054 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:19:46,054 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:19:46,055 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:19:46,062 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-08-12 19:19:46,080 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:19:46,090 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:46,090 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:46,090 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-08-12 19:19:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:46,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438198473] [2021-08-12 19:19:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:46,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438198473] [2021-08-12 19:19:46,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438198473] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:46,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:19:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26504063] [2021-08-12 19:19:46,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:19:46,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:19:46,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:19:46,282 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:46,350 INFO L93 Difference]: Finished difference Result 153 states and 385 transitions. [2021-08-12 19:19:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:19:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:19:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:46,362 INFO L225 Difference]: With dead ends: 153 [2021-08-12 19:19:46,362 INFO L226 Difference]: Without dead ends: 56 [2021-08-12 19:19:46,365 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:19:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-12 19:19:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-12 19:19:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-08-12 19:19:46,410 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-08-12 19:19:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:46,410 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-08-12 19:19:46,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-08-12 19:19:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:19:46,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:46,413 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:46,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:19:46,413 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-08-12 19:19:46,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:46,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994403325] [2021-08-12 19:19:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:46,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994403325] [2021-08-12 19:19:46,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994403325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:46,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:46,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:19:46,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623807168] [2021-08-12 19:19:46,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:19:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:19:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:19:46,474 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:46,539 INFO L93 Difference]: Finished difference Result 116 states and 247 transitions. [2021-08-12 19:19:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:19:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:19:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:46,544 INFO L225 Difference]: With dead ends: 116 [2021-08-12 19:19:46,544 INFO L226 Difference]: Without dead ends: 66 [2021-08-12 19:19:46,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-12 19:19:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-12 19:19:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-08-12 19:19:46,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-08-12 19:19:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:46,560 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-08-12 19:19:46,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-08-12 19:19:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:19:46,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:46,562 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:19:46,562 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-08-12 19:19:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:46,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763770055] [2021-08-12 19:19:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:46,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763770055] [2021-08-12 19:19:46,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763770055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:46,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247101753] [2021-08-12 19:19:46,653 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 [2021-08-12 19:19:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:19:46,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247101753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:46,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:46,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-12 19:19:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685946703] [2021-08-12 19:19:46,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:19:46,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:19:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:19:46,836 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:46,920 INFO L93 Difference]: Finished difference Result 126 states and 271 transitions. [2021-08-12 19:19:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:19:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:46,922 INFO L225 Difference]: With dead ends: 126 [2021-08-12 19:19:46,922 INFO L226 Difference]: Without dead ends: 76 [2021-08-12 19:19:46,923 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-12 19:19:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-08-12 19:19:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-08-12 19:19:46,928 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-08-12 19:19:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:46,929 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-08-12 19:19:46,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-08-12 19:19:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:19:46,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:46,930 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:47,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:19:47,131 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-08-12 19:19:47,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:47,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068930468] [2021-08-12 19:19:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:47,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:47,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068930468] [2021-08-12 19:19:47,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068930468] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:19:47,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:19:47,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:19:47,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691066540] [2021-08-12 19:19:47,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:19:47,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:19:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:19:47,167 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:47,238 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-08-12 19:19:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:19:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:19:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:47,239 INFO L225 Difference]: With dead ends: 134 [2021-08-12 19:19:47,239 INFO L226 Difference]: Without dead ends: 84 [2021-08-12 19:19:47,240 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:19:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-12 19:19:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-08-12 19:19:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-08-12 19:19:47,248 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-08-12 19:19:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:47,248 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-08-12 19:19:47,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-08-12 19:19:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:47,249 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:47,249 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:47,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:19:47,249 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-08-12 19:19:47,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:47,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899649295] [2021-08-12 19:19:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:47,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:47,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899649295] [2021-08-12 19:19:47,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899649295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:47,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113556109] [2021-08-12 19:19:47,296 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 [2021-08-12 19:19:47,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:19:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:47,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113556109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:47,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:19:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513418748] [2021-08-12 19:19:47,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:19:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:19:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:47,522 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:47,588 INFO L93 Difference]: Finished difference Result 144 states and 315 transitions. [2021-08-12 19:19:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:19:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:19:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:47,592 INFO L225 Difference]: With dead ends: 144 [2021-08-12 19:19:47,593 INFO L226 Difference]: Without dead ends: 94 [2021-08-12 19:19:47,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:19:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-12 19:19:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-08-12 19:19:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-08-12 19:19:47,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-08-12 19:19:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:47,600 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-08-12 19:19:47,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-08-12 19:19:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:19:47,601 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:47,601 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:47,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:47,803 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-08-12 19:19:47,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:47,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852614590] [2021-08-12 19:19:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:47,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852614590] [2021-08-12 19:19:47,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852614590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:47,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96970767] [2021-08-12 19:19:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:19:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:19:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96970767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:47,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:47,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:19:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440049952] [2021-08-12 19:19:47,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:19:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:19:47,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:19:47,953 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:48,113 INFO L93 Difference]: Finished difference Result 192 states and 443 transitions. [2021-08-12 19:19:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:19:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:19:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:48,115 INFO L225 Difference]: With dead ends: 192 [2021-08-12 19:19:48,115 INFO L226 Difference]: Without dead ends: 126 [2021-08-12 19:19:48,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-12 19:19:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-08-12 19:19:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-08-12 19:19:48,124 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-08-12 19:19:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:48,125 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-08-12 19:19:48,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-08-12 19:19:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:19:48,126 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:48,126 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:48,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:48,348 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-08-12 19:19:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:48,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098631371] [2021-08-12 19:19:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:48,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:48,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098631371] [2021-08-12 19:19:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098631371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446805588] [2021-08-12 19:19:48,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:19:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:19:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:48,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446805588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:48,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:48,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:19:48,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851793277] [2021-08-12 19:19:48,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:48,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:48,602 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-08-12 19:19:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:48,725 INFO L93 Difference]: Finished difference Result 178 states and 399 transitions. [2021-08-12 19:19:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:19:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20 [2021-08-12 19:19:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:48,729 INFO L225 Difference]: With dead ends: 178 [2021-08-12 19:19:48,729 INFO L226 Difference]: Without dead ends: 128 [2021-08-12 19:19:48,732 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-12 19:19:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-08-12 19:19:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-08-12 19:19:48,754 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-08-12 19:19:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:48,754 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-08-12 19:19:48,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-08-12 19:19:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-08-12 19:19:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:19:48,755 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:48,755 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:48,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:48,956 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-08-12 19:19:48,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:48,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128222143] [2021-08-12 19:19:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:49,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:49,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128222143] [2021-08-12 19:19:49,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128222143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:49,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670027673] [2021-08-12 19:19:49,018 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 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 [2021-08-12 19:19:49,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:19:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670027673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:49,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:49,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:19:49,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10082252] [2021-08-12 19:19:49,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:49,158 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-08-12 19:19:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:49,288 INFO L93 Difference]: Finished difference Result 186 states and 419 transitions. [2021-08-12 19:19:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:19:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20 [2021-08-12 19:19:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:49,289 INFO L225 Difference]: With dead ends: 186 [2021-08-12 19:19:49,289 INFO L226 Difference]: Without dead ends: 136 [2021-08-12 19:19:49,290 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:19:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-12 19:19:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-08-12 19:19:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-08-12 19:19:49,297 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-08-12 19:19:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:49,298 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-08-12 19:19:49,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-08-12 19:19:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-08-12 19:19:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:19:49,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:49,299 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:49,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:19:49,522 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:49,522 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-08-12 19:19:49,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:49,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431408144] [2021-08-12 19:19:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:49,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431408144] [2021-08-12 19:19:49,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431408144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824736883] [2021-08-12 19:19:49,593 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 [2021-08-12 19:19:49,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:49,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:49,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:19:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:49,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824736883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:49,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:49,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:19:49,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625239064] [2021-08-12 19:19:49,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:19:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:19:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:19:49,783 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:49,894 INFO L93 Difference]: Finished difference Result 186 states and 419 transitions. [2021-08-12 19:19:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:19:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:19:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:49,896 INFO L225 Difference]: With dead ends: 186 [2021-08-12 19:19:49,896 INFO L226 Difference]: Without dead ends: 136 [2021-08-12 19:19:49,896 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-12 19:19:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-08-12 19:19:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-08-12 19:19:49,902 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-08-12 19:19:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:49,902 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-08-12 19:19:49,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-08-12 19:19:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:19:49,903 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:49,903 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:50,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:19:50,126 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-08-12 19:19:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:50,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329459571] [2021-08-12 19:19:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:50,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:50,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329459571] [2021-08-12 19:19:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329459571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176736022] [2021-08-12 19:19:50,208 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 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 [2021-08-12 19:19:50,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:50,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:19:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:50,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176736022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:50,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:50,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:19:50,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736431987] [2021-08-12 19:19:50,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:50,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:50,425 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:50,637 INFO L93 Difference]: Finished difference Result 248 states and 583 transitions. [2021-08-12 19:19:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:19:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 19:19:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:50,639 INFO L225 Difference]: With dead ends: 248 [2021-08-12 19:19:50,640 INFO L226 Difference]: Without dead ends: 174 [2021-08-12 19:19:50,640 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:19:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-12 19:19:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-08-12 19:19:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-08-12 19:19:50,647 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-08-12 19:19:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:50,647 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-08-12 19:19:50,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-08-12 19:19:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:19:50,648 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:50,648 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:50,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:50,857 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-08-12 19:19:50,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:50,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047800638] [2021-08-12 19:19:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:50,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:50,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047800638] [2021-08-12 19:19:50,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047800638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:50,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11407027] [2021-08-12 19:19:50,930 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 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 [2021-08-12 19:19:50,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:19:50,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:19:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:51,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11407027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:51,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:51,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:19:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835101527] [2021-08-12 19:19:51,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:51,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:51,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:51,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:51,088 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:51,382 INFO L93 Difference]: Finished difference Result 404 states and 933 transitions. [2021-08-12 19:19:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:19:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 19:19:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:51,386 INFO L225 Difference]: With dead ends: 404 [2021-08-12 19:19:51,386 INFO L226 Difference]: Without dead ends: 326 [2021-08-12 19:19:51,387 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:19:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-12 19:19:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2021-08-12 19:19:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-08-12 19:19:51,401 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 22 [2021-08-12 19:19:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:51,402 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-08-12 19:19:51,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-08-12 19:19:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:19:51,404 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:51,404 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:51,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:19:51,627 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:51,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1909707008, now seen corresponding path program 3 times [2021-08-12 19:19:51,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:51,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602783992] [2021-08-12 19:19:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:51,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602783992] [2021-08-12 19:19:51,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602783992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243427974] [2021-08-12 19:19:51,704 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 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 [2021-08-12 19:19:51,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:19:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:19:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243427974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:51,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:51,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:19:51,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726473785] [2021-08-12 19:19:51,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:19:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:19:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:19:51,895 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-08-12 19:19:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:52,104 INFO L93 Difference]: Finished difference Result 320 states and 763 transitions. [2021-08-12 19:19:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:19:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 22 [2021-08-12 19:19:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:52,107 INFO L225 Difference]: With dead ends: 320 [2021-08-12 19:19:52,107 INFO L226 Difference]: Without dead ends: 254 [2021-08-12 19:19:52,107 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:19:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-12 19:19:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-08-12 19:19:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-08-12 19:19:52,131 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 22 [2021-08-12 19:19:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:52,131 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-08-12 19:19:52,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-08-12 19:19:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-08-12 19:19:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:52,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:52,132 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:52,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:52,345 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 4 times [2021-08-12 19:19:52,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:52,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700643539] [2021-08-12 19:19:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:52,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:52,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700643539] [2021-08-12 19:19:52,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700643539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174635001] [2021-08-12 19:19:52,431 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 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 [2021-08-12 19:19:52,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:52,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174635001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:52,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:52,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078626335] [2021-08-12 19:19:52,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:52,645 INFO L87 Difference]: Start difference. First operand 230 states and 549 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) [2021-08-12 19:19:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:52,915 INFO L93 Difference]: Finished difference Result 336 states and 799 transitions. [2021-08-12 19:19:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:19:52,915 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 24 [2021-08-12 19:19:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:52,917 INFO L225 Difference]: With dead ends: 336 [2021-08-12 19:19:52,917 INFO L226 Difference]: Without dead ends: 278 [2021-08-12 19:19:52,918 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:19:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-12 19:19:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2021-08-12 19:19:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-08-12 19:19:52,937 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-08-12 19:19:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-08-12 19:19:52,938 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) [2021-08-12 19:19:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-08-12 19:19:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:52,938 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:52,939 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:53,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:19:53,153 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 5 times [2021-08-12 19:19:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:53,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558501877] [2021-08-12 19:19:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:53,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:53,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558501877] [2021-08-12 19:19:53,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558501877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952064944] [2021-08-12 19:19:53,233 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 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 [2021-08-12 19:19:53,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:19:53,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:53,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:53,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:53,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952064944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:53,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:53,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945213620] [2021-08-12 19:19:53,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:53,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:53,438 INFO L87 Difference]: Start difference. First operand 246 states and 589 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) [2021-08-12 19:19:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:53,748 INFO L93 Difference]: Finished difference Result 360 states and 859 transitions. [2021-08-12 19:19:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:19:53,749 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 24 [2021-08-12 19:19:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:53,751 INFO L225 Difference]: With dead ends: 360 [2021-08-12 19:19:53,751 INFO L226 Difference]: Without dead ends: 302 [2021-08-12 19:19:53,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:19:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-12 19:19:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-08-12 19:19:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-08-12 19:19:53,762 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-08-12 19:19:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:53,763 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-08-12 19:19:53,763 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) [2021-08-12 19:19:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-08-12 19:19:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:53,763 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:53,764 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:53,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:19:53,977 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 6 times [2021-08-12 19:19:53,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:53,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493818462] [2021-08-12 19:19:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:54,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:54,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493818462] [2021-08-12 19:19:54,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493818462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:54,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583173285] [2021-08-12 19:19:54,059 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 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 [2021-08-12 19:19:54,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:19:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:54,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583173285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:54,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:54,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744837275] [2021-08-12 19:19:54,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:54,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:54,265 INFO L87 Difference]: Start difference. First operand 246 states and 589 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) [2021-08-12 19:19:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:54,570 INFO L93 Difference]: Finished difference Result 392 states and 947 transitions. [2021-08-12 19:19:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:19:54,570 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 24 [2021-08-12 19:19:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:54,572 INFO L225 Difference]: With dead ends: 392 [2021-08-12 19:19:54,572 INFO L226 Difference]: Without dead ends: 318 [2021-08-12 19:19:54,573 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:19:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-12 19:19:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 278. [2021-08-12 19:19:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-08-12 19:19:54,586 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-08-12 19:19:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:54,586 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-08-12 19:19:54,587 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) [2021-08-12 19:19:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-08-12 19:19:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:54,587 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:54,587 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:54,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:54,801 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 7 times [2021-08-12 19:19:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:54,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084747847] [2021-08-12 19:19:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:54,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084747847] [2021-08-12 19:19:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084747847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:54,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663066756] [2021-08-12 19:19:54,892 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 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 [2021-08-12 19:19:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:55,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663066756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:55,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:55,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123451145] [2021-08-12 19:19:55,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:55,133 INFO L87 Difference]: Start difference. First operand 278 states and 669 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) [2021-08-12 19:19:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:55,435 INFO L93 Difference]: Finished difference Result 344 states and 815 transitions. [2021-08-12 19:19:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:19:55,435 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 24 [2021-08-12 19:19:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:55,437 INFO L225 Difference]: With dead ends: 344 [2021-08-12 19:19:55,438 INFO L226 Difference]: Without dead ends: 294 [2021-08-12 19:19:55,438 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:19:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-12 19:19:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-08-12 19:19:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-08-12 19:19:55,451 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-08-12 19:19:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:55,451 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-08-12 19:19:55,451 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) [2021-08-12 19:19:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-08-12 19:19:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:55,452 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:55,452 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:55,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:19:55,675 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:55,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 8 times [2021-08-12 19:19:55,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:55,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508845547] [2021-08-12 19:19:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:55,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:55,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508845547] [2021-08-12 19:19:55,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508845547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:55,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920802140] [2021-08-12 19:19:55,758 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 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 [2021-08-12 19:19:55,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:55,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920802140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:55,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:55,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:55,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060533930] [2021-08-12 19:19:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:55,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:55,941 INFO L87 Difference]: Start difference. First operand 278 states and 669 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) [2021-08-12 19:19:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:56,262 INFO L93 Difference]: Finished difference Result 384 states and 919 transitions. [2021-08-12 19:19:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:19:56,263 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 24 [2021-08-12 19:19:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:56,265 INFO L225 Difference]: With dead ends: 384 [2021-08-12 19:19:56,265 INFO L226 Difference]: Without dead ends: 326 [2021-08-12 19:19:56,266 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:19:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-12 19:19:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 294. [2021-08-12 19:19:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-08-12 19:19:56,282 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-08-12 19:19:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:56,283 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-08-12 19:19:56,283 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) [2021-08-12 19:19:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-08-12 19:19:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:56,284 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:56,284 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:56,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:56,501 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:56,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:56,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 9 times [2021-08-12 19:19:56,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:56,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672012304] [2021-08-12 19:19:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:56,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672012304] [2021-08-12 19:19:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672012304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218696342] [2021-08-12 19:19:56,572 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 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 [2021-08-12 19:19:56,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:19:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218696342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:56,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:56,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:56,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088772982] [2021-08-12 19:19:56,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:56,754 INFO L87 Difference]: Start difference. First operand 294 states and 709 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) [2021-08-12 19:19:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:56,928 INFO L93 Difference]: Finished difference Result 360 states and 855 transitions. [2021-08-12 19:19:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:19:56,929 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 24 [2021-08-12 19:19:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:56,931 INFO L225 Difference]: With dead ends: 360 [2021-08-12 19:19:56,931 INFO L226 Difference]: Without dead ends: 310 [2021-08-12 19:19:56,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:19:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-12 19:19:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-08-12 19:19:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-08-12 19:19:56,954 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-08-12 19:19:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:56,954 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-08-12 19:19:56,954 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) [2021-08-12 19:19:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-08-12 19:19:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:56,955 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:56,955 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:57,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:57,169 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 10 times [2021-08-12 19:19:57,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:57,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263663570] [2021-08-12 19:19:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:57,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263663570] [2021-08-12 19:19:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263663570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719356022] [2021-08-12 19:19:57,237 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 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 [2021-08-12 19:19:57,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:19:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719356022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:57,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:57,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401365300] [2021-08-12 19:19:57,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:57,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:57,456 INFO L87 Difference]: Start difference. First operand 286 states and 689 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) [2021-08-12 19:19:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:57,692 INFO L93 Difference]: Finished difference Result 376 states and 895 transitions. [2021-08-12 19:19:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:19:57,693 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 24 [2021-08-12 19:19:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:57,695 INFO L225 Difference]: With dead ends: 376 [2021-08-12 19:19:57,695 INFO L226 Difference]: Without dead ends: 326 [2021-08-12 19:19:57,695 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:19:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-12 19:19:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2021-08-12 19:19:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-08-12 19:19:57,709 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-08-12 19:19:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:57,710 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-08-12 19:19:57,710 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) [2021-08-12 19:19:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-08-12 19:19:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:57,711 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:57,711 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:57,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:19:57,933 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 11 times [2021-08-12 19:19:57,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367218805] [2021-08-12 19:19:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367218805] [2021-08-12 19:19:58,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367218805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:58,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759362463] [2021-08-12 19:19:58,007 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 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 [2021-08-12 19:19:58,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:19:58,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:58,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759362463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:58,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:58,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:58,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742298878] [2021-08-12 19:19:58,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:58,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:58,219 INFO L87 Difference]: Start difference. First operand 286 states and 689 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) [2021-08-12 19:19:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:58,520 INFO L93 Difference]: Finished difference Result 392 states and 939 transitions. [2021-08-12 19:19:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:19:58,520 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 24 [2021-08-12 19:19:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:58,523 INFO L225 Difference]: With dead ends: 392 [2021-08-12 19:19:58,523 INFO L226 Difference]: Without dead ends: 334 [2021-08-12 19:19:58,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:19:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-12 19:19:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 294. [2021-08-12 19:19:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-08-12 19:19:58,538 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-08-12 19:19:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:58,538 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-08-12 19:19:58,538 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) [2021-08-12 19:19:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-08-12 19:19:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:58,539 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:58,539 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:58,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-12 19:19:58,762 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 12 times [2021-08-12 19:19:58,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:58,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641885810] [2021-08-12 19:19:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:58,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641885810] [2021-08-12 19:19:58,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641885810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796995680] [2021-08-12 19:19:58,831 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 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 [2021-08-12 19:19:58,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:19:58,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796995680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:59,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:59,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:59,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024530510] [2021-08-12 19:19:59,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:59,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:59,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:59,027 INFO L87 Difference]: Start difference. First operand 294 states and 709 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) [2021-08-12 19:19:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:59,263 INFO L93 Difference]: Finished difference Result 368 states and 875 transitions. [2021-08-12 19:19:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:19:59,263 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 24 [2021-08-12 19:19:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:59,265 INFO L225 Difference]: With dead ends: 368 [2021-08-12 19:19:59,265 INFO L226 Difference]: Without dead ends: 318 [2021-08-12 19:19:59,266 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:19:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-12 19:19:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2021-08-12 19:19:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-08-12 19:19:59,281 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-08-12 19:19:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:59,281 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-08-12 19:19:59,281 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) [2021-08-12 19:19:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-08-12 19:19:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:19:59,282 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:59,282 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:59,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-12 19:19:59,497 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 13 times [2021-08-12 19:19:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5004934] [2021-08-12 19:19:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:59,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:59,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5004934] [2021-08-12 19:19:59,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5004934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:59,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495756874] [2021-08-12 19:19:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:19:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:19:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495756874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:59,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:59,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:19:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425861757] [2021-08-12 19:19:59,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:19:59,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:19:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:19:59,772 INFO L87 Difference]: Start difference. First operand 286 states and 689 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) [2021-08-12 19:20:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:00,020 INFO L93 Difference]: Finished difference Result 368 states and 879 transitions. [2021-08-12 19:20:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:00,021 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 24 [2021-08-12 19:20:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:00,023 INFO L225 Difference]: With dead ends: 368 [2021-08-12 19:20:00,023 INFO L226 Difference]: Without dead ends: 310 [2021-08-12 19:20:00,024 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:20:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-12 19:20:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-08-12 19:20:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-08-12 19:20:00,038 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-08-12 19:20:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:00,038 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-08-12 19:20:00,038 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) [2021-08-12 19:20:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-08-12 19:20:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:20:00,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:00,039 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:00,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 19:20:00,253 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 14 times [2021-08-12 19:20:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038659680] [2021-08-12 19:20:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:00,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038659680] [2021-08-12 19:20:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038659680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740405427] [2021-08-12 19:20:00,318 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 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 [2021-08-12 19:20:00,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:00,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:00,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:20:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740405427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:00,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:00,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:20:00,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348573895] [2021-08-12 19:20:00,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:20:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:20:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:00,492 INFO L87 Difference]: Start difference. First operand 286 states and 689 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) [2021-08-12 19:20:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:00,683 INFO L93 Difference]: Finished difference Result 344 states and 811 transitions. [2021-08-12 19:20:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:20:00,684 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 24 [2021-08-12 19:20:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:00,686 INFO L225 Difference]: With dead ends: 344 [2021-08-12 19:20:00,686 INFO L226 Difference]: Without dead ends: 294 [2021-08-12 19:20:00,686 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:20:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-12 19:20:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-08-12 19:20:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-08-12 19:20:00,700 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-08-12 19:20:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:00,700 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-08-12 19:20:00,700 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) [2021-08-12 19:20:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-08-12 19:20:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:20:00,701 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:00,701 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:00,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 19:20:00,917 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash -546283658, now seen corresponding path program 15 times [2021-08-12 19:20:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123811688] [2021-08-12 19:20:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:00,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123811688] [2021-08-12 19:20:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123811688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044623554] [2021-08-12 19:20:00,977 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 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 [2021-08-12 19:20:01,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:20:01,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:20:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044623554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:01,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:01,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:20:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106907288] [2021-08-12 19:20:01,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:20:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:20:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:01,149 INFO L87 Difference]: Start difference. First operand 262 states and 625 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) [2021-08-12 19:20:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:01,326 INFO L93 Difference]: Finished difference Result 336 states and 791 transitions. [2021-08-12 19:20:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:20:01,326 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 24 [2021-08-12 19:20:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:01,328 INFO L225 Difference]: With dead ends: 336 [2021-08-12 19:20:01,328 INFO L226 Difference]: Without dead ends: 286 [2021-08-12 19:20:01,329 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:20:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-12 19:20:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-08-12 19:20:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-08-12 19:20:01,342 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-08-12 19:20:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:01,342 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-08-12 19:20:01,342 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) [2021-08-12 19:20:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-08-12 19:20:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:20:01,343 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:01,343 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:01,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:01,557 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -358593358, now seen corresponding path program 16 times [2021-08-12 19:20:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589151357] [2021-08-12 19:20:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:01,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589151357] [2021-08-12 19:20:01,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589151357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:01,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926385170] [2021-08-12 19:20:01,618 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 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 [2021-08-12 19:20:01,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:20:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926385170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:01,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:01,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:20:01,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762424766] [2021-08-12 19:20:01,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:20:01,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:20:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:20:01,797 INFO L87 Difference]: Start difference. First operand 262 states and 625 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) [2021-08-12 19:20:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:02,052 INFO L93 Difference]: Finished difference Result 376 states and 895 transitions. [2021-08-12 19:20:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:02,053 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 24 [2021-08-12 19:20:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:02,055 INFO L225 Difference]: With dead ends: 376 [2021-08-12 19:20:02,055 INFO L226 Difference]: Without dead ends: 318 [2021-08-12 19:20:02,055 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:20:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-12 19:20:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-08-12 19:20:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-08-12 19:20:02,073 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-08-12 19:20:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:02,073 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-08-12 19:20:02,073 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) [2021-08-12 19:20:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-08-12 19:20:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:02,074 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:02,074 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:02,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:02,289 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 17 times [2021-08-12 19:20:02,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:02,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634205098] [2021-08-12 19:20:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:02,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:02,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634205098] [2021-08-12 19:20:02,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634205098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:02,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537008377] [2021-08-12 19:20:02,371 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 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 [2021-08-12 19:20:02,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:20:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:02,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537008377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:02,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:02,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955314763] [2021-08-12 19:20:02,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:02,599 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:02,959 INFO L93 Difference]: Finished difference Result 424 states and 1019 transitions. [2021-08-12 19:20:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:02,962 INFO L225 Difference]: With dead ends: 424 [2021-08-12 19:20:02,962 INFO L226 Difference]: Without dead ends: 358 [2021-08-12 19:20:02,962 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-12 19:20:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 278. [2021-08-12 19:20:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4007220216606497) internal successors, (665), 277 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 665 transitions. [2021-08-12 19:20:02,978 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 665 transitions. Word has length 26 [2021-08-12 19:20:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:02,978 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 665 transitions. [2021-08-12 19:20:02,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 665 transitions. [2021-08-12 19:20:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:02,979 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:02,979 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:03,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-12 19:20:03,201 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 18 times [2021-08-12 19:20:03,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:03,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496932509] [2021-08-12 19:20:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496932509] [2021-08-12 19:20:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496932509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640448629] [2021-08-12 19:20:03,282 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 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 [2021-08-12 19:20:03,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:20:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:03,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640448629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:03,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:03,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841308656] [2021-08-12 19:20:03,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:03,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:03,547 INFO L87 Difference]: Start difference. First operand 278 states and 665 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:03,896 INFO L93 Difference]: Finished difference Result 488 states and 1183 transitions. [2021-08-12 19:20:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:03,898 INFO L225 Difference]: With dead ends: 488 [2021-08-12 19:20:03,898 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 19:20:03,898 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 19:20:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2021-08-12 19:20:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-08-12 19:20:03,918 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-08-12 19:20:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:03,918 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-08-12 19:20:03,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-08-12 19:20:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:03,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:03,919 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:04,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:04,142 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 19 times [2021-08-12 19:20:04,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:04,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40975385] [2021-08-12 19:20:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:04,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:04,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40975385] [2021-08-12 19:20:04,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40975385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788071355] [2021-08-12 19:20:04,227 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 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 [2021-08-12 19:20:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:04,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788071355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:04,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:04,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:04,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174557817] [2021-08-12 19:20:04,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:04,491 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:04,883 INFO L93 Difference]: Finished difference Result 572 states and 1353 transitions. [2021-08-12 19:20:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:04,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:04,886 INFO L225 Difference]: With dead ends: 572 [2021-08-12 19:20:04,886 INFO L226 Difference]: Without dead ends: 494 [2021-08-12 19:20:04,886 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-12 19:20:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 342. [2021-08-12 19:20:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.43108504398827) internal successors, (829), 341 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 829 transitions. [2021-08-12 19:20:04,911 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 829 transitions. Word has length 26 [2021-08-12 19:20:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:04,911 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 829 transitions. [2021-08-12 19:20:04,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 829 transitions. [2021-08-12 19:20:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:04,912 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:04,912 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:05,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-12 19:20:05,125 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1803206464, now seen corresponding path program 20 times [2021-08-12 19:20:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481609727] [2021-08-12 19:20:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:05,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481609727] [2021-08-12 19:20:05,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481609727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641645623] [2021-08-12 19:20:05,202 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 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 [2021-08-12 19:20:05,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:05,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641645623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:05,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:05,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366598782] [2021-08-12 19:20:05,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:05,407 INFO L87 Difference]: Start difference. First operand 342 states and 829 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:05,683 INFO L93 Difference]: Finished difference Result 496 states and 1203 transitions. [2021-08-12 19:20:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:05,685 INFO L225 Difference]: With dead ends: 496 [2021-08-12 19:20:05,685 INFO L226 Difference]: Without dead ends: 430 [2021-08-12 19:20:05,685 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-12 19:20:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-08-12 19:20:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.432664756446991) internal successors, (849), 349 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 849 transitions. [2021-08-12 19:20:05,704 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 849 transitions. Word has length 26 [2021-08-12 19:20:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:05,705 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 849 transitions. [2021-08-12 19:20:05,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 849 transitions. [2021-08-12 19:20:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:05,706 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:05,706 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-12 19:20:05,928 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 21 times [2021-08-12 19:20:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:05,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340167499] [2021-08-12 19:20:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340167499] [2021-08-12 19:20:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340167499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694412146] [2021-08-12 19:20:06,003 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 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 [2021-08-12 19:20:06,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:20:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694412146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:06,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:06,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098093485] [2021-08-12 19:20:06,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:06,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:06,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:06,247 INFO L87 Difference]: Start difference. First operand 350 states and 849 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:06,601 INFO L93 Difference]: Finished difference Result 528 states and 1287 transitions. [2021-08-12 19:20:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:06,603 INFO L225 Difference]: With dead ends: 528 [2021-08-12 19:20:06,603 INFO L226 Difference]: Without dead ends: 454 [2021-08-12 19:20:06,604 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-12 19:20:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2021-08-12 19:20:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.434173669467787) internal successors, (869), 357 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 869 transitions. [2021-08-12 19:20:06,625 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 869 transitions. Word has length 26 [2021-08-12 19:20:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:06,625 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 869 transitions. [2021-08-12 19:20:06,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 869 transitions. [2021-08-12 19:20:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:06,626 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:06,626 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:06,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-12 19:20:06,849 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1044932168, now seen corresponding path program 22 times [2021-08-12 19:20:06,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:06,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787113608] [2021-08-12 19:20:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787113608] [2021-08-12 19:20:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787113608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407543067] [2021-08-12 19:20:06,917 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 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 [2021-08-12 19:20:06,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:06,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:07,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407543067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:07,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:07,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:07,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869459827] [2021-08-12 19:20:07,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:07,173 INFO L87 Difference]: Start difference. First operand 358 states and 869 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:07,625 INFO L93 Difference]: Finished difference Result 584 states and 1423 transitions. [2021-08-12 19:20:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:07,628 INFO L225 Difference]: With dead ends: 584 [2021-08-12 19:20:07,629 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:20:07,629 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:20:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:20:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2021-08-12 19:20:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.4395886889460154) internal successors, (949), 389 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 949 transitions. [2021-08-12 19:20:07,659 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 949 transitions. Word has length 26 [2021-08-12 19:20:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:07,660 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 949 transitions. [2021-08-12 19:20:07,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 949 transitions. [2021-08-12 19:20:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:07,661 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:07,661 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:07,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-12 19:20:07,877 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 23 times [2021-08-12 19:20:07,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:07,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485961516] [2021-08-12 19:20:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:07,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:07,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485961516] [2021-08-12 19:20:07,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485961516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:07,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022835991] [2021-08-12 19:20:07,953 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 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 [2021-08-12 19:20:07,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:20:07,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022835991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:08,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:08,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:08,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50358347] [2021-08-12 19:20:08,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:08,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:08,196 INFO L87 Difference]: Start difference. First operand 390 states and 949 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:08,701 INFO L93 Difference]: Finished difference Result 592 states and 1447 transitions. [2021-08-12 19:20:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:08,704 INFO L225 Difference]: With dead ends: 592 [2021-08-12 19:20:08,704 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:20:08,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:20:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-08-12 19:20:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-08-12 19:20:08,738 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-08-12 19:20:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:08,738 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-08-12 19:20:08,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-08-12 19:20:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:08,740 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:08,740 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:08,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-12 19:20:08,961 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 24 times [2021-08-12 19:20:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:08,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924643722] [2021-08-12 19:20:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:09,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:09,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924643722] [2021-08-12 19:20:09,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924643722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:09,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980541637] [2021-08-12 19:20:09,054 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 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 [2021-08-12 19:20:09,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:20:09,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:09,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980541637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:09,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:09,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:09,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125910709] [2021-08-12 19:20:09,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:09,318 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:09,711 INFO L93 Difference]: Finished difference Result 584 states and 1423 transitions. [2021-08-12 19:20:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:09,714 INFO L225 Difference]: With dead ends: 584 [2021-08-12 19:20:09,714 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:20:09,714 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:20:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:20:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-08-12 19:20:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-08-12 19:20:09,741 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-08-12 19:20:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:09,741 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-08-12 19:20:09,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-08-12 19:20:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:09,742 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:09,742 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:09,964 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 319483004, now seen corresponding path program 25 times [2021-08-12 19:20:09,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:09,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013300835] [2021-08-12 19:20:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:10,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:10,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013300835] [2021-08-12 19:20:10,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013300835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:10,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044919221] [2021-08-12 19:20:10,034 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 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 [2021-08-12 19:20:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:10,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044919221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:10,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:10,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:10,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464485434] [2021-08-12 19:20:10,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:10,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:10,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:10,285 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:10,627 INFO L93 Difference]: Finished difference Result 544 states and 1323 transitions. [2021-08-12 19:20:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:10,629 INFO L225 Difference]: With dead ends: 544 [2021-08-12 19:20:10,629 INFO L226 Difference]: Without dead ends: 478 [2021-08-12 19:20:10,630 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-12 19:20:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-08-12 19:20:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4419753086419753) internal successors, (989), 405 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 989 transitions. [2021-08-12 19:20:10,658 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 989 transitions. Word has length 26 [2021-08-12 19:20:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:10,658 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 989 transitions. [2021-08-12 19:20:10,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 989 transitions. [2021-08-12 19:20:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:10,659 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:10,659 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:10,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-12 19:20:10,862 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 26 times [2021-08-12 19:20:10,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:10,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106505856] [2021-08-12 19:20:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:10,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:10,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106505856] [2021-08-12 19:20:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106505856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:10,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277738374] [2021-08-12 19:20:10,939 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 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 [2021-08-12 19:20:10,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:11,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277738374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:11,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:11,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:11,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502212478] [2021-08-12 19:20:11,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:11,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:11,195 INFO L87 Difference]: Start difference. First operand 406 states and 989 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:11,696 INFO L93 Difference]: Finished difference Result 584 states and 1427 transitions. [2021-08-12 19:20:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:11,700 INFO L225 Difference]: With dead ends: 584 [2021-08-12 19:20:11,700 INFO L226 Difference]: Without dead ends: 510 [2021-08-12 19:20:11,700 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-12 19:20:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 422. [2021-08-12 19:20:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4441805225653206) internal successors, (1029), 421 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1029 transitions. [2021-08-12 19:20:11,735 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1029 transitions. Word has length 26 [2021-08-12 19:20:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:11,735 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1029 transitions. [2021-08-12 19:20:11,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1029 transitions. [2021-08-12 19:20:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:11,736 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:11,736 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:11,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-08-12 19:20:11,953 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 27 times [2021-08-12 19:20:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:11,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767364163] [2021-08-12 19:20:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:12,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767364163] [2021-08-12 19:20:12,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767364163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388853536] [2021-08-12 19:20:12,023 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 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 [2021-08-12 19:20:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:20:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388853536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:12,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:12,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253287753] [2021-08-12 19:20:12,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:12,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:12,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:12,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:12,237 INFO L87 Difference]: Start difference. First operand 422 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:12,672 INFO L93 Difference]: Finished difference Result 624 states and 1527 transitions. [2021-08-12 19:20:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:12,675 INFO L225 Difference]: With dead ends: 624 [2021-08-12 19:20:12,675 INFO L226 Difference]: Without dead ends: 550 [2021-08-12 19:20:12,676 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:20:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-12 19:20:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 438. [2021-08-12 19:20:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.446224256292906) internal successors, (1069), 437 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1069 transitions. [2021-08-12 19:20:12,716 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1069 transitions. Word has length 26 [2021-08-12 19:20:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:12,716 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1069 transitions. [2021-08-12 19:20:12,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1069 transitions. [2021-08-12 19:20:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:12,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:12,717 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:12,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:12,937 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 28 times [2021-08-12 19:20:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:12,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187865622] [2021-08-12 19:20:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:13,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187865622] [2021-08-12 19:20:13,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187865622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439408452] [2021-08-12 19:20:13,012 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 [2021-08-12 19:20:13,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:13,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:13,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439408452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:13,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:13,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:13,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261073307] [2021-08-12 19:20:13,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:13,240 INFO L87 Difference]: Start difference. First operand 438 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:13,721 INFO L93 Difference]: Finished difference Result 756 states and 1817 transitions. [2021-08-12 19:20:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:20:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:13,724 INFO L225 Difference]: With dead ends: 756 [2021-08-12 19:20:13,724 INFO L226 Difference]: Without dead ends: 678 [2021-08-12 19:20:13,725 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:20:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-12 19:20:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 446. [2021-08-12 19:20:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.447191011235955) internal successors, (1089), 445 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1089 transitions. [2021-08-12 19:20:13,761 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1089 transitions. Word has length 26 [2021-08-12 19:20:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:13,761 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1089 transitions. [2021-08-12 19:20:13,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1089 transitions. [2021-08-12 19:20:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:13,763 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:13,763 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:13,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-12 19:20:13,982 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:13,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1675418936, now seen corresponding path program 29 times [2021-08-12 19:20:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:13,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114504288] [2021-08-12 19:20:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:14,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114504288] [2021-08-12 19:20:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114504288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633299067] [2021-08-12 19:20:14,057 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 [2021-08-12 19:20:14,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:20:14,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:14,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633299067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:14,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:14,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:14,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777696734] [2021-08-12 19:20:14,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:14,293 INFO L87 Difference]: Start difference. First operand 446 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:14,758 INFO L93 Difference]: Finished difference Result 670 states and 1598 transitions. [2021-08-12 19:20:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:14,760 INFO L225 Difference]: With dead ends: 670 [2021-08-12 19:20:14,760 INFO L226 Difference]: Without dead ends: 604 [2021-08-12 19:20:14,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-12 19:20:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 470. [2021-08-12 19:20:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.458422174840085) internal successors, (1153), 469 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1153 transitions. [2021-08-12 19:20:14,799 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1153 transitions. Word has length 26 [2021-08-12 19:20:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1153 transitions. [2021-08-12 19:20:14,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1153 transitions. [2021-08-12 19:20:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:14,801 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:14,801 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:15,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:15,023 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1238039736, now seen corresponding path program 30 times [2021-08-12 19:20:15,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:15,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81849231] [2021-08-12 19:20:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:15,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:15,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81849231] [2021-08-12 19:20:15,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81849231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:15,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226468494] [2021-08-12 19:20:15,105 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 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 [2021-08-12 19:20:15,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:20:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:15,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226468494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:15,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:15,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:15,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280608053] [2021-08-12 19:20:15,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:15,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:15,351 INFO L87 Difference]: Start difference. First operand 470 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:15,867 INFO L93 Difference]: Finished difference Result 672 states and 1647 transitions. [2021-08-12 19:20:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:15,870 INFO L225 Difference]: With dead ends: 672 [2021-08-12 19:20:15,870 INFO L226 Difference]: Without dead ends: 606 [2021-08-12 19:20:15,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-08-12 19:20:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 486. [2021-08-12 19:20:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-08-12 19:20:15,922 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-08-12 19:20:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:15,922 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-08-12 19:20:15,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-08-12 19:20:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:20:15,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:15,924 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-12 19:20:16,129 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1700991628, now seen corresponding path program 31 times [2021-08-12 19:20:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955817253] [2021-08-12 19:20:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:16,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955817253] [2021-08-12 19:20:16,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955817253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040486205] [2021-08-12 19:20:16,200 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 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 [2021-08-12 19:20:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:16,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040486205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:16,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:16,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:20:16,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226024628] [2021-08-12 19:20:16,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:16,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:16,444 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:16,876 INFO L93 Difference]: Finished difference Result 640 states and 1567 transitions. [2021-08-12 19:20:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-08-12 19:20:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:16,879 INFO L225 Difference]: With dead ends: 640 [2021-08-12 19:20:16,879 INFO L226 Difference]: Without dead ends: 574 [2021-08-12 19:20:16,880 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-08-12 19:20:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2021-08-12 19:20:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-08-12 19:20:16,929 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-08-12 19:20:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:16,929 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-08-12 19:20:16,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-12 19:20:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-08-12 19:20:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:16,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:16,930 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:17,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-12 19:20:17,145 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-08-12 19:20:17,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:17,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71626352] [2021-08-12 19:20:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:17,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:17,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71626352] [2021-08-12 19:20:17,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71626352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487232887] [2021-08-12 19:20:17,260 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 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 [2021-08-12 19:20:17,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:20:17,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:20:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:17,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487232887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:17,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:17,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788644458] [2021-08-12 19:20:17,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:17,598 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:17,997 INFO L93 Difference]: Finished difference Result 590 states and 1439 transitions. [2021-08-12 19:20:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:20:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:18,001 INFO L225 Difference]: With dead ends: 590 [2021-08-12 19:20:18,001 INFO L226 Difference]: Without dead ends: 524 [2021-08-12 19:20:18,001 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-12 19:20:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-08-12 19:20:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.4549098196392785) internal successors, (1225), 499 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1225 transitions. [2021-08-12 19:20:18,052 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1225 transitions. Word has length 28 [2021-08-12 19:20:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:18,052 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1225 transitions. [2021-08-12 19:20:18,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1225 transitions. [2021-08-12 19:20:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:18,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:18,053 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:18,277 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 32 times [2021-08-12 19:20:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249262748] [2021-08-12 19:20:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:18,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249262748] [2021-08-12 19:20:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249262748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738957295] [2021-08-12 19:20:18,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:18,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:18,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738957295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:18,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:18,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:18,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929054744] [2021-08-12 19:20:18,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:18,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:18,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:18,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:18,734 INFO L87 Difference]: Start difference. First operand 500 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:19,386 INFO L93 Difference]: Finished difference Result 686 states and 1675 transitions. [2021-08-12 19:20:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:20:19,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:19,389 INFO L225 Difference]: With dead ends: 686 [2021-08-12 19:20:19,389 INFO L226 Difference]: Without dead ends: 628 [2021-08-12 19:20:19,389 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:20:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-08-12 19:20:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 508. [2021-08-12 19:20:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.455621301775148) internal successors, (1245), 507 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1245 transitions. [2021-08-12 19:20:19,427 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1245 transitions. Word has length 28 [2021-08-12 19:20:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:19,427 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1245 transitions. [2021-08-12 19:20:19,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1245 transitions. [2021-08-12 19:20:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:19,428 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:19,428 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:19,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-08-12 19:20:19,645 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:19,646 INFO L82 PathProgramCache]: Analyzing trace with hash -945290426, now seen corresponding path program 33 times [2021-08-12 19:20:19,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:19,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834950939] [2021-08-12 19:20:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:19,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:19,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834950939] [2021-08-12 19:20:19,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834950939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:19,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698531417] [2021-08-12 19:20:19,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:19,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:20:19,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698531417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:20,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:20,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:20,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859798377] [2021-08-12 19:20:20,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:20,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:20,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:20,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:20,001 INFO L87 Difference]: Start difference. First operand 508 states and 1245 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:20,567 INFO L93 Difference]: Finished difference Result 742 states and 1823 transitions. [2021-08-12 19:20:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:20:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:20,570 INFO L225 Difference]: With dead ends: 742 [2021-08-12 19:20:20,570 INFO L226 Difference]: Without dead ends: 668 [2021-08-12 19:20:20,571 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:20:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-12 19:20:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 556. [2021-08-12 19:20:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-08-12 19:20:20,617 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-08-12 19:20:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:20,617 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-08-12 19:20:20,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-08-12 19:20:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:20,618 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:20,618 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:20,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:20,833 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 34 times [2021-08-12 19:20:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:20,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775191809] [2021-08-12 19:20:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:20,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:20,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775191809] [2021-08-12 19:20:20,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775191809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:20,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081405798] [2021-08-12 19:20:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:20,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:20,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:21,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081405798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:21,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:21,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:21,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743817349] [2021-08-12 19:20:21,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:21,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:21,251 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:21,728 INFO L93 Difference]: Finished difference Result 710 states and 1743 transitions. [2021-08-12 19:20:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:21,732 INFO L225 Difference]: With dead ends: 710 [2021-08-12 19:20:21,732 INFO L226 Difference]: Without dead ends: 636 [2021-08-12 19:20:21,732 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-12 19:20:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 556. [2021-08-12 19:20:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-08-12 19:20:21,781 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-08-12 19:20:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:21,781 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-08-12 19:20:21,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-08-12 19:20:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:21,782 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:21,782 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:21,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-08-12 19:20:21,991 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 35 times [2021-08-12 19:20:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:21,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647627457] [2021-08-12 19:20:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:22,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:22,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647627457] [2021-08-12 19:20:22,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647627457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:22,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240839923] [2021-08-12 19:20:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:22,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:20:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240839923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:22,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:22,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:22,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788463516] [2021-08-12 19:20:22,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:22,444 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:22,955 INFO L93 Difference]: Finished difference Result 750 states and 1839 transitions. [2021-08-12 19:20:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:22,958 INFO L225 Difference]: With dead ends: 750 [2021-08-12 19:20:22,958 INFO L226 Difference]: Without dead ends: 684 [2021-08-12 19:20:22,959 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-12 19:20:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 564. [2021-08-12 19:20:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-08-12 19:20:23,006 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-08-12 19:20:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:23,006 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-08-12 19:20:23,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-08-12 19:20:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:23,007 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:23,007 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:23,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:23,219 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 36 times [2021-08-12 19:20:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:23,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55804763] [2021-08-12 19:20:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:23,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55804763] [2021-08-12 19:20:23,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55804763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173734040] [2021-08-12 19:20:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:23,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:20:23,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173734040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:23,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:23,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:23,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209903849] [2021-08-12 19:20:23,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:23,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:23,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:23,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:23,628 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:24,246 INFO L93 Difference]: Finished difference Result 758 states and 1859 transitions. [2021-08-12 19:20:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:20:24,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:24,249 INFO L225 Difference]: With dead ends: 758 [2021-08-12 19:20:24,249 INFO L226 Difference]: Without dead ends: 692 [2021-08-12 19:20:24,249 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:20:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-12 19:20:24,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 572. [2021-08-12 19:20:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.460595446584939) internal successors, (1405), 571 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1405 transitions. [2021-08-12 19:20:24,298 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1405 transitions. Word has length 28 [2021-08-12 19:20:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:24,298 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1405 transitions. [2021-08-12 19:20:24,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1405 transitions. [2021-08-12 19:20:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:24,304 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:24,304 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:24,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:24,505 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash 451849338, now seen corresponding path program 37 times [2021-08-12 19:20:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:24,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636140966] [2021-08-12 19:20:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:24,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636140966] [2021-08-12 19:20:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636140966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995248829] [2021-08-12 19:20:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:24,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:20:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:24,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995248829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:24,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:24,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151472123] [2021-08-12 19:20:24,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:24,866 INFO L87 Difference]: Start difference. First operand 572 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:25,310 INFO L93 Difference]: Finished difference Result 694 states and 1695 transitions. [2021-08-12 19:20:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:25,313 INFO L225 Difference]: With dead ends: 694 [2021-08-12 19:20:25,313 INFO L226 Difference]: Without dead ends: 636 [2021-08-12 19:20:25,314 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:25,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-12 19:20:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-08-12 19:20:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-08-12 19:20:25,364 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-08-12 19:20:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:25,364 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-08-12 19:20:25,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-08-12 19:20:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:25,365 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:25,365 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:25,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-08-12 19:20:25,566 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 280163074, now seen corresponding path program 38 times [2021-08-12 19:20:25,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:25,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176218166] [2021-08-12 19:20:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:25,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:25,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176218166] [2021-08-12 19:20:25,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176218166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:25,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965275851] [2021-08-12 19:20:25,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:25,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:25,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965275851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:25,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780193216] [2021-08-12 19:20:25,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:25,955 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:26,617 INFO L93 Difference]: Finished difference Result 822 states and 2023 transitions. [2021-08-12 19:20:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:20:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:26,620 INFO L225 Difference]: With dead ends: 822 [2021-08-12 19:20:26,620 INFO L226 Difference]: Without dead ends: 748 [2021-08-12 19:20:26,620 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:20:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-12 19:20:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 604. [2021-08-12 19:20:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.462686567164179) internal successors, (1485), 603 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1485 transitions. [2021-08-12 19:20:26,677 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1485 transitions. Word has length 28 [2021-08-12 19:20:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:26,678 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1485 transitions. [2021-08-12 19:20:26,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1485 transitions. [2021-08-12 19:20:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:26,678 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:26,678 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:26,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:26,879 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 39 times [2021-08-12 19:20:26,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:26,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152891042] [2021-08-12 19:20:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:26,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:26,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152891042] [2021-08-12 19:20:26,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152891042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:26,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686522252] [2021-08-12 19:20:26,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:20:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686522252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:27,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:27,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476359059] [2021-08-12 19:20:27,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:27,265 INFO L87 Difference]: Start difference. First operand 604 states and 1485 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:27,832 INFO L93 Difference]: Finished difference Result 790 states and 1939 transitions. [2021-08-12 19:20:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:27,834 INFO L225 Difference]: With dead ends: 790 [2021-08-12 19:20:27,835 INFO L226 Difference]: Without dead ends: 724 [2021-08-12 19:20:27,835 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-08-12 19:20:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 612. [2021-08-12 19:20:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-08-12 19:20:27,892 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-08-12 19:20:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:27,893 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-08-12 19:20:27,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-08-12 19:20:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:27,893 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:27,893 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:28,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-08-12 19:20:28,094 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1726991738, now seen corresponding path program 40 times [2021-08-12 19:20:28,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:28,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904297059] [2021-08-12 19:20:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:28,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904297059] [2021-08-12 19:20:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904297059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492816227] [2021-08-12 19:20:28,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:28,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:20:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:28,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492816227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:28,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:28,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:28,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121856243] [2021-08-12 19:20:28,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:28,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:28,452 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:29,009 INFO L93 Difference]: Finished difference Result 774 states and 1895 transitions. [2021-08-12 19:20:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:29,011 INFO L225 Difference]: With dead ends: 774 [2021-08-12 19:20:29,011 INFO L226 Difference]: Without dead ends: 716 [2021-08-12 19:20:29,011 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-12 19:20:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 588. [2021-08-12 19:20:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4616695059625213) internal successors, (1445), 587 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1445 transitions. [2021-08-12 19:20:29,066 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1445 transitions. Word has length 28 [2021-08-12 19:20:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:29,066 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1445 transitions. [2021-08-12 19:20:29,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1445 transitions. [2021-08-12 19:20:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:29,067 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:29,067 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:29,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:29,267 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 41 times [2021-08-12 19:20:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:29,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557204478] [2021-08-12 19:20:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:29,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557204478] [2021-08-12 19:20:29,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557204478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185452797] [2021-08-12 19:20:29,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:29,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:20:29,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:29,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:29,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185452797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:29,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:29,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:29,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972852488] [2021-08-12 19:20:29,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:29,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:29,762 INFO L87 Difference]: Start difference. First operand 588 states and 1445 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:30,458 INFO L93 Difference]: Finished difference Result 782 states and 1915 transitions. [2021-08-12 19:20:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:30,460 INFO L225 Difference]: With dead ends: 782 [2021-08-12 19:20:30,460 INFO L226 Difference]: Without dead ends: 724 [2021-08-12 19:20:30,461 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-08-12 19:20:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 620. [2021-08-12 19:20:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4636510500807756) internal successors, (1525), 619 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1525 transitions. [2021-08-12 19:20:30,520 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1525 transitions. Word has length 28 [2021-08-12 19:20:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:30,520 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1525 transitions. [2021-08-12 19:20:30,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1525 transitions. [2021-08-12 19:20:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:30,521 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:30,521 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:30,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:30,722 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1388654202, now seen corresponding path program 42 times [2021-08-12 19:20:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:30,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333519520] [2021-08-12 19:20:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:30,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333519520] [2021-08-12 19:20:30,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333519520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:30,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096425726] [2021-08-12 19:20:30,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:30,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:20:30,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:31,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096425726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:31,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:31,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:31,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425556472] [2021-08-12 19:20:31,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:31,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:31,172 INFO L87 Difference]: Start difference. First operand 620 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:31,759 INFO L93 Difference]: Finished difference Result 806 states and 1975 transitions. [2021-08-12 19:20:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:31,761 INFO L225 Difference]: With dead ends: 806 [2021-08-12 19:20:31,761 INFO L226 Difference]: Without dead ends: 748 [2021-08-12 19:20:31,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 578.7ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-12 19:20:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 612. [2021-08-12 19:20:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-08-12 19:20:31,825 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-08-12 19:20:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:31,826 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-08-12 19:20:31,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-08-12 19:20:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:31,826 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:31,826 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:32,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-08-12 19:20:32,027 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash -238558138, now seen corresponding path program 43 times [2021-08-12 19:20:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:32,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257625493] [2021-08-12 19:20:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:32,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:32,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257625493] [2021-08-12 19:20:32,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257625493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:32,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023555821] [2021-08-12 19:20:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:32,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023555821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:32,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:32,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:32,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533140371] [2021-08-12 19:20:32,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:32,438 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:33,191 INFO L93 Difference]: Finished difference Result 782 states and 1919 transitions. [2021-08-12 19:20:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:20:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:33,193 INFO L225 Difference]: With dead ends: 782 [2021-08-12 19:20:33,193 INFO L226 Difference]: Without dead ends: 716 [2021-08-12 19:20:33,193 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:20:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-12 19:20:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 660. [2021-08-12 19:20:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-08-12 19:20:33,260 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-08-12 19:20:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:33,260 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-08-12 19:20:33,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-08-12 19:20:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:33,261 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:33,261 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:33,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-08-12 19:20:33,461 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 44 times [2021-08-12 19:20:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:33,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755040907] [2021-08-12 19:20:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:33,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755040907] [2021-08-12 19:20:33,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755040907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066523814] [2021-08-12 19:20:33,588 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 [2021-08-12 19:20:33,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:33,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066523814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:33,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:33,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:33,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819100117] [2021-08-12 19:20:33,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:33,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:33,870 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:34,563 INFO L93 Difference]: Finished difference Result 822 states and 2019 transitions. [2021-08-12 19:20:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:34,566 INFO L225 Difference]: With dead ends: 822 [2021-08-12 19:20:34,566 INFO L226 Difference]: Without dead ends: 756 [2021-08-12 19:20:34,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-08-12 19:20:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 660. [2021-08-12 19:20:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-08-12 19:20:34,661 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-08-12 19:20:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:34,661 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-08-12 19:20:34,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-08-12 19:20:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:34,662 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:34,662 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:34,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:34,877 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 45 times [2021-08-12 19:20:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696879174] [2021-08-12 19:20:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:34,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:34,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696879174] [2021-08-12 19:20:34,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696879174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:34,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29867633] [2021-08-12 19:20:34,986 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 [2021-08-12 19:20:35,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:20:35,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:35,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29867633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:35,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:35,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:35,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859155814] [2021-08-12 19:20:35,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:35,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:35,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:35,314 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:36,032 INFO L93 Difference]: Finished difference Result 846 states and 2075 transitions. [2021-08-12 19:20:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:36,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:36,038 INFO L225 Difference]: With dead ends: 846 [2021-08-12 19:20:36,038 INFO L226 Difference]: Without dead ends: 788 [2021-08-12 19:20:36,039 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-08-12 19:20:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-08-12 19:20:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4662668665667167) internal successors, (1645), 667 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1645 transitions. [2021-08-12 19:20:36,111 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1645 transitions. Word has length 28 [2021-08-12 19:20:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:36,111 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 1645 transitions. [2021-08-12 19:20:36,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1645 transitions. [2021-08-12 19:20:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:36,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:36,113 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:36,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-08-12 19:20:36,315 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 46 times [2021-08-12 19:20:36,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:36,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174562703] [2021-08-12 19:20:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:36,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:36,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174562703] [2021-08-12 19:20:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174562703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252996679] [2021-08-12 19:20:36,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:36,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:36,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252996679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:36,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:36,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:36,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695202779] [2021-08-12 19:20:36,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:36,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:36,757 INFO L87 Difference]: Start difference. First operand 668 states and 1645 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:37,374 INFO L93 Difference]: Finished difference Result 830 states and 2043 transitions. [2021-08-12 19:20:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:37,376 INFO L225 Difference]: With dead ends: 830 [2021-08-12 19:20:37,376 INFO L226 Difference]: Without dead ends: 756 [2021-08-12 19:20:37,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-08-12 19:20:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 684. [2021-08-12 19:20:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-08-12 19:20:37,446 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-08-12 19:20:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:37,447 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-08-12 19:20:37,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-08-12 19:20:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:37,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:37,448 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:37,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-08-12 19:20:37,648 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 47 times [2021-08-12 19:20:37,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:37,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50500421] [2021-08-12 19:20:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50500421] [2021-08-12 19:20:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50500421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159698994] [2021-08-12 19:20:37,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:37,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:20:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:38,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159698994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:38,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:38,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:38,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942290235] [2021-08-12 19:20:38,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:38,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:38,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:38,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:38,111 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:38,724 INFO L93 Difference]: Finished difference Result 838 states and 2055 transitions. [2021-08-12 19:20:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:38,726 INFO L225 Difference]: With dead ends: 838 [2021-08-12 19:20:38,726 INFO L226 Difference]: Without dead ends: 780 [2021-08-12 19:20:38,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-12 19:20:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 692. [2021-08-12 19:20:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-08-12 19:20:38,797 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-08-12 19:20:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:38,797 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-08-12 19:20:38,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-08-12 19:20:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:38,798 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:38,798 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:39,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-08-12 19:20:39,010 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash -285003654, now seen corresponding path program 48 times [2021-08-12 19:20:39,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:39,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805966649] [2021-08-12 19:20:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805966649] [2021-08-12 19:20:39,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805966649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311244490] [2021-08-12 19:20:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:39,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:20:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311244490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:39,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801664134] [2021-08-12 19:20:39,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:39,431 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:40,030 INFO L93 Difference]: Finished difference Result 870 states and 2135 transitions. [2021-08-12 19:20:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:40,032 INFO L225 Difference]: With dead ends: 870 [2021-08-12 19:20:40,032 INFO L226 Difference]: Without dead ends: 812 [2021-08-12 19:20:40,032 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-12 19:20:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-08-12 19:20:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-08-12 19:20:40,103 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-08-12 19:20:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:40,103 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-08-12 19:20:40,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-08-12 19:20:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:40,104 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:40,104 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:40,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:40,304 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 49 times [2021-08-12 19:20:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:40,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421067096] [2021-08-12 19:20:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:40,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:40,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421067096] [2021-08-12 19:20:40,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421067096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:40,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656309842] [2021-08-12 19:20:40,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:40,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656309842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:40,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:40,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:40,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287607546] [2021-08-12 19:20:40,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:40,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:40,767 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:41,405 INFO L93 Difference]: Finished difference Result 862 states and 2123 transitions. [2021-08-12 19:20:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:41,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:41,408 INFO L225 Difference]: With dead ends: 862 [2021-08-12 19:20:41,408 INFO L226 Difference]: Without dead ends: 788 [2021-08-12 19:20:41,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-08-12 19:20:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 684. [2021-08-12 19:20:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-08-12 19:20:41,478 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-08-12 19:20:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:41,478 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-08-12 19:20:41,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-08-12 19:20:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:41,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:41,479 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:41,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:41,680 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 50 times [2021-08-12 19:20:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223292295] [2021-08-12 19:20:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:41,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223292295] [2021-08-12 19:20:41,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223292295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69595260] [2021-08-12 19:20:41,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:41,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69595260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:42,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106208295] [2021-08-12 19:20:42,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:42,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:42,050 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:42,604 INFO L93 Difference]: Finished difference Result 830 states and 2043 transitions. [2021-08-12 19:20:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:42,611 INFO L225 Difference]: With dead ends: 830 [2021-08-12 19:20:42,611 INFO L226 Difference]: Without dead ends: 756 [2021-08-12 19:20:42,611 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:20:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-08-12 19:20:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-08-12 19:20:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-08-12 19:20:42,691 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-08-12 19:20:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:42,691 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-08-12 19:20:42,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-08-12 19:20:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:42,692 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:42,692 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:42,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:42,893 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 51 times [2021-08-12 19:20:42,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:42,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027853406] [2021-08-12 19:20:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027853406] [2021-08-12 19:20:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027853406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261153563] [2021-08-12 19:20:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:43,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:20:43,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261153563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:43,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468752981] [2021-08-12 19:20:43,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:43,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:43,288 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:43,978 INFO L93 Difference]: Finished difference Result 878 states and 2167 transitions. [2021-08-12 19:20:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:20:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:43,981 INFO L225 Difference]: With dead ends: 878 [2021-08-12 19:20:43,981 INFO L226 Difference]: Without dead ends: 796 [2021-08-12 19:20:43,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:20:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-08-12 19:20:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 708. [2021-08-12 19:20:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.468175388967468) internal successors, (1745), 707 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1745 transitions. [2021-08-12 19:20:44,070 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1745 transitions. Word has length 28 [2021-08-12 19:20:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:44,070 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1745 transitions. [2021-08-12 19:20:44,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1745 transitions. [2021-08-12 19:20:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:44,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:44,072 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:44,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-08-12 19:20:44,285 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 52 times [2021-08-12 19:20:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:44,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039019506] [2021-08-12 19:20:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:44,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039019506] [2021-08-12 19:20:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039019506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591840040] [2021-08-12 19:20:44,371 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 [2021-08-12 19:20:44,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:44,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591840040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:44,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:44,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785489669] [2021-08-12 19:20:44,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:44,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:44,625 INFO L87 Difference]: Start difference. First operand 708 states and 1745 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:45,213 INFO L93 Difference]: Finished difference Result 854 states and 2095 transitions. [2021-08-12 19:20:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:45,215 INFO L225 Difference]: With dead ends: 854 [2021-08-12 19:20:45,216 INFO L226 Difference]: Without dead ends: 796 [2021-08-12 19:20:45,216 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-08-12 19:20:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-08-12 19:20:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-08-12 19:20:45,343 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-08-12 19:20:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:45,343 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-08-12 19:20:45,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-08-12 19:20:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:45,344 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:45,344 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:45,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:45,545 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 53 times [2021-08-12 19:20:45,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:45,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280477710] [2021-08-12 19:20:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:45,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:45,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280477710] [2021-08-12 19:20:45,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280477710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:45,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298283143] [2021-08-12 19:20:45,670 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 [2021-08-12 19:20:45,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:20:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:20:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298283143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:45,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:45,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:45,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465280017] [2021-08-12 19:20:45,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:45,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:45,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:45,987 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:46,561 INFO L93 Difference]: Finished difference Result 886 states and 2179 transitions. [2021-08-12 19:20:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:46,564 INFO L225 Difference]: With dead ends: 886 [2021-08-12 19:20:46,564 INFO L226 Difference]: Without dead ends: 820 [2021-08-12 19:20:46,564 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-08-12 19:20:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 716. [2021-08-12 19:20:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-08-12 19:20:46,683 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-08-12 19:20:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:46,684 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-08-12 19:20:46,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-08-12 19:20:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:46,685 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:46,685 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:46,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:46,889 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 54 times [2021-08-12 19:20:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:46,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719846151] [2021-08-12 19:20:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:46,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719846151] [2021-08-12 19:20:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719846151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358857527] [2021-08-12 19:20:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:47,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:20:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358857527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:47,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:47,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615357526] [2021-08-12 19:20:47,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:47,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:47,341 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:48,024 INFO L93 Difference]: Finished difference Result 902 states and 2219 transitions. [2021-08-12 19:20:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:48,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:48,027 INFO L225 Difference]: With dead ends: 902 [2021-08-12 19:20:48,027 INFO L226 Difference]: Without dead ends: 836 [2021-08-12 19:20:48,027 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-12 19:20:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 732. [2021-08-12 19:20:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-08-12 19:20:48,113 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-08-12 19:20:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:48,113 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-08-12 19:20:48,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-08-12 19:20:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:48,114 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:48,114 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:48,329 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 55 times [2021-08-12 19:20:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860373358] [2021-08-12 19:20:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860373358] [2021-08-12 19:20:48,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860373358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182821945] [2021-08-12 19:20:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182821945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:48,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:48,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043378433] [2021-08-12 19:20:48,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:48,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:48,781 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:49,398 INFO L93 Difference]: Finished difference Result 926 states and 2275 transitions. [2021-08-12 19:20:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:49,401 INFO L225 Difference]: With dead ends: 926 [2021-08-12 19:20:49,402 INFO L226 Difference]: Without dead ends: 868 [2021-08-12 19:20:49,402 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-12 19:20:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 732. [2021-08-12 19:20:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-08-12 19:20:49,533 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-08-12 19:20:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:49,534 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-08-12 19:20:49,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-08-12 19:20:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:49,535 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:49,535 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:49,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:49,735 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 56 times [2021-08-12 19:20:49,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:49,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005527813] [2021-08-12 19:20:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:49,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:49,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005527813] [2021-08-12 19:20:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005527813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665129130] [2021-08-12 19:20:49,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:49,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665129130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:50,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:50,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:50,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733038371] [2021-08-12 19:20:50,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:50,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:50,113 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:50,722 INFO L93 Difference]: Finished difference Result 918 states and 2263 transitions. [2021-08-12 19:20:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:20:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:50,725 INFO L225 Difference]: With dead ends: 918 [2021-08-12 19:20:50,725 INFO L226 Difference]: Without dead ends: 844 [2021-08-12 19:20:50,725 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:20:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-12 19:20:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 748. [2021-08-12 19:20:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-08-12 19:20:50,859 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-08-12 19:20:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:50,860 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-08-12 19:20:50,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-08-12 19:20:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:50,861 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:50,861 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:51,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:51,077 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 57 times [2021-08-12 19:20:51,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:51,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938122673] [2021-08-12 19:20:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938122673] [2021-08-12 19:20:51,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938122673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:51,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696976142] [2021-08-12 19:20:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:51,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:20:51,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:51,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696976142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:51,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:51,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859311828] [2021-08-12 19:20:51,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:51,530 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:52,216 INFO L93 Difference]: Finished difference Result 934 states and 2307 transitions. [2021-08-12 19:20:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:20:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:52,218 INFO L225 Difference]: With dead ends: 934 [2021-08-12 19:20:52,218 INFO L226 Difference]: Without dead ends: 852 [2021-08-12 19:20:52,218 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 594.2ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:20:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-12 19:20:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 748. [2021-08-12 19:20:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-08-12 19:20:52,321 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-08-12 19:20:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:52,321 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-08-12 19:20:52,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-08-12 19:20:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:52,322 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:52,322 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:52,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-08-12 19:20:52,537 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1967831874, now seen corresponding path program 58 times [2021-08-12 19:20:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:52,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854923852] [2021-08-12 19:20:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:52,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:52,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854923852] [2021-08-12 19:20:52,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854923852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:52,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745341243] [2021-08-12 19:20:52,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:52,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:52,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745341243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:52,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:52,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:52,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103956507] [2021-08-12 19:20:52,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:52,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:52,982 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:53,708 INFO L93 Difference]: Finished difference Result 910 states and 2235 transitions. [2021-08-12 19:20:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:20:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:53,710 INFO L225 Difference]: With dead ends: 910 [2021-08-12 19:20:53,710 INFO L226 Difference]: Without dead ends: 852 [2021-08-12 19:20:53,710 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-12 19:20:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 740. [2021-08-12 19:20:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.469553450608931) internal successors, (1825), 739 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1825 transitions. [2021-08-12 19:20:53,804 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1825 transitions. Word has length 28 [2021-08-12 19:20:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:53,805 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1825 transitions. [2021-08-12 19:20:53,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1825 transitions. [2021-08-12 19:20:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:53,806 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:53,806 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:54,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-08-12 19:20:54,006 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1175607874, now seen corresponding path program 59 times [2021-08-12 19:20:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:54,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836976444] [2021-08-12 19:20:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836976444] [2021-08-12 19:20:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836976444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:54,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984445679] [2021-08-12 19:20:54,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:54,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:20:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:54,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984445679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:54,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:54,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779167874] [2021-08-12 19:20:54,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:54,428 INFO L87 Difference]: Start difference. First operand 740 states and 1825 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:55,151 INFO L93 Difference]: Finished difference Result 894 states and 2199 transitions. [2021-08-12 19:20:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:55,153 INFO L225 Difference]: With dead ends: 894 [2021-08-12 19:20:55,153 INFO L226 Difference]: Without dead ends: 828 [2021-08-12 19:20:55,154 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-12 19:20:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 716. [2021-08-12 19:20:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-08-12 19:20:55,253 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-08-12 19:20:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:55,253 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-08-12 19:20:55,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-08-12 19:20:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:55,254 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:55,254 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:55,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-08-12 19:20:55,463 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1970549754, now seen corresponding path program 60 times [2021-08-12 19:20:55,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:55,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525408536] [2021-08-12 19:20:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:55,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525408536] [2021-08-12 19:20:55,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525408536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415452281] [2021-08-12 19:20:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:55,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:20:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:55,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415452281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:55,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:55,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:55,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218469118] [2021-08-12 19:20:55,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:55,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:55,847 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:56,523 INFO L93 Difference]: Finished difference Result 954 states and 2282 transitions. [2021-08-12 19:20:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:20:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:56,526 INFO L225 Difference]: With dead ends: 954 [2021-08-12 19:20:56,526 INFO L226 Difference]: Without dead ends: 888 [2021-08-12 19:20:56,526 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-08-12 19:20:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 716. [2021-08-12 19:20:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-08-12 19:20:56,622 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-08-12 19:20:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:56,622 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-08-12 19:20:56,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-08-12 19:20:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:56,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:56,623 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:56,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:56,823 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash 221531890, now seen corresponding path program 61 times [2021-08-12 19:20:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:56,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552744431] [2021-08-12 19:20:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:56,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552744431] [2021-08-12 19:20:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552744431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328149121] [2021-08-12 19:20:56,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328149121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:57,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:57,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013745481] [2021-08-12 19:20:57,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:57,139 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:57,765 INFO L93 Difference]: Finished difference Result 806 states and 1967 transitions. [2021-08-12 19:20:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:57,768 INFO L225 Difference]: With dead ends: 806 [2021-08-12 19:20:57,768 INFO L226 Difference]: Without dead ends: 748 [2021-08-12 19:20:57,768 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-12 19:20:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-08-12 19:20:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-08-12 19:20:57,865 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-08-12 19:20:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-08-12 19:20:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-08-12 19:20:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:57,866 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:57,867 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:58,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-08-12 19:20:58,081 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 62 times [2021-08-12 19:20:58,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:58,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918112645] [2021-08-12 19:20:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:58,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:58,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918112645] [2021-08-12 19:20:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918112645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819089707] [2021-08-12 19:20:58,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:58,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:58,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:58,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819089707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:58,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:58,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015203155] [2021-08-12 19:20:58,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:58,454 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:59,359 INFO L93 Difference]: Finished difference Result 910 states and 2231 transitions. [2021-08-12 19:20:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:20:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:20:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:59,361 INFO L225 Difference]: With dead ends: 910 [2021-08-12 19:20:59,361 INFO L226 Difference]: Without dead ends: 844 [2021-08-12 19:20:59,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 705.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:20:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-12 19:20:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 724. [2021-08-12 19:20:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-08-12 19:20:59,459 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-08-12 19:20:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:59,459 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-08-12 19:20:59,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-08-12 19:20:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:20:59,460 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:59,460 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:59,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:59,660 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 63 times [2021-08-12 19:20:59,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:59,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128402841] [2021-08-12 19:20:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:59,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:59,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128402841] [2021-08-12 19:20:59,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128402841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:59,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851856817] [2021-08-12 19:20:59,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:59,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:20:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:20:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851856817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:00,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:00,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313749085] [2021-08-12 19:21:00,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:00,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:00,070 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:00,904 INFO L93 Difference]: Finished difference Result 950 states and 2339 transitions. [2021-08-12 19:21:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:21:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:00,906 INFO L225 Difference]: With dead ends: 950 [2021-08-12 19:21:00,906 INFO L226 Difference]: Without dead ends: 868 [2021-08-12 19:21:00,906 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:21:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-12 19:21:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 716. [2021-08-12 19:21:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-08-12 19:21:01,003 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-08-12 19:21:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:01,003 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-08-12 19:21:01,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-08-12 19:21:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:01,004 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:01,004 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:01,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable726 [2021-08-12 19:21:01,205 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 64 times [2021-08-12 19:21:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:01,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996752888] [2021-08-12 19:21:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:01,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996752888] [2021-08-12 19:21:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996752888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911270621] [2021-08-12 19:21:01,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:01,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:01,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911270621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:01,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:01,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958419413] [2021-08-12 19:21:01,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:01,539 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:02,153 INFO L93 Difference]: Finished difference Result 902 states and 2215 transitions. [2021-08-12 19:21:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:21:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:02,155 INFO L225 Difference]: With dead ends: 902 [2021-08-12 19:21:02,155 INFO L226 Difference]: Without dead ends: 828 [2021-08-12 19:21:02,155 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:21:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-12 19:21:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 732. [2021-08-12 19:21:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-08-12 19:21:02,258 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 28 [2021-08-12 19:21:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:02,258 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-08-12 19:21:02,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-08-12 19:21:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:02,259 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:02,259 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:02,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-08-12 19:21:02,459 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 65 times [2021-08-12 19:21:02,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:02,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949887892] [2021-08-12 19:21:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:02,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:02,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949887892] [2021-08-12 19:21:02,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949887892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:02,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025733894] [2021-08-12 19:21:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:02,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:21:02,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:02,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025733894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:02,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:02,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:02,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262285035] [2021-08-12 19:21:02,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:02,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:02,818 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:03,596 INFO L93 Difference]: Finished difference Result 966 states and 2379 transitions. [2021-08-12 19:21:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:03,598 INFO L225 Difference]: With dead ends: 966 [2021-08-12 19:21:03,598 INFO L226 Difference]: Without dead ends: 884 [2021-08-12 19:21:03,598 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-08-12 19:21:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 740. [2021-08-12 19:21:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-08-12 19:21:03,705 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-08-12 19:21:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:03,705 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-08-12 19:21:03,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-08-12 19:21:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:03,706 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:03,706 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:03,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-08-12 19:21:03,907 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 66 times [2021-08-12 19:21:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:03,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031343969] [2021-08-12 19:21:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:03,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:03,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031343969] [2021-08-12 19:21:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031343969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:03,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554630314] [2021-08-12 19:21:03,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:04,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:21:04,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:04,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554630314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:04,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:04,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279240876] [2021-08-12 19:21:04,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:04,258 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:04,952 INFO L93 Difference]: Finished difference Result 902 states and 2211 transitions. [2021-08-12 19:21:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:21:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:04,954 INFO L225 Difference]: With dead ends: 902 [2021-08-12 19:21:04,954 INFO L226 Difference]: Without dead ends: 836 [2021-08-12 19:21:04,954 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:21:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-12 19:21:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 740. [2021-08-12 19:21:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-08-12 19:21:05,066 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-08-12 19:21:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:05,066 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-08-12 19:21:05,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-08-12 19:21:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:05,067 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:05,067 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:05,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:05,268 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 67 times [2021-08-12 19:21:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:05,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820051663] [2021-08-12 19:21:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820051663] [2021-08-12 19:21:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820051663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102885349] [2021-08-12 19:21:05,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:05,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102885349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:05,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590284423] [2021-08-12 19:21:05,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:05,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:05,594 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:06,331 INFO L93 Difference]: Finished difference Result 918 states and 2255 transitions. [2021-08-12 19:21:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:06,334 INFO L225 Difference]: With dead ends: 918 [2021-08-12 19:21:06,334 INFO L226 Difference]: Without dead ends: 844 [2021-08-12 19:21:06,335 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-12 19:21:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 740. [2021-08-12 19:21:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-08-12 19:21:06,452 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-08-12 19:21:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:06,452 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-08-12 19:21:06,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-08-12 19:21:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:06,453 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:06,453 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:06,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:06,654 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 68 times [2021-08-12 19:21:06,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:06,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140739359] [2021-08-12 19:21:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140739359] [2021-08-12 19:21:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140739359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282724987] [2021-08-12 19:21:06,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:06,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:07,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282724987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:07,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:07,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:07,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531342399] [2021-08-12 19:21:07,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:07,029 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:07,868 INFO L93 Difference]: Finished difference Result 926 states and 2271 transitions. [2021-08-12 19:21:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:07,870 INFO L225 Difference]: With dead ends: 926 [2021-08-12 19:21:07,870 INFO L226 Difference]: Without dead ends: 860 [2021-08-12 19:21:07,871 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-08-12 19:21:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 748. [2021-08-12 19:21:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.459170013386881) internal successors, (1837), 747 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1837 transitions. [2021-08-12 19:21:07,990 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1837 transitions. Word has length 28 [2021-08-12 19:21:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:07,990 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1837 transitions. [2021-08-12 19:21:07,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1837 transitions. [2021-08-12 19:21:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:07,991 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:07,991 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:08,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:08,192 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 69 times [2021-08-12 19:21:08,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:08,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991059549] [2021-08-12 19:21:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:08,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:08,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991059549] [2021-08-12 19:21:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991059549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:08,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511251813] [2021-08-12 19:21:08,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:08,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:21:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511251813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:08,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:08,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:08,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242031645] [2021-08-12 19:21:08,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:08,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:08,561 INFO L87 Difference]: Start difference. First operand 748 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:09,310 INFO L93 Difference]: Finished difference Result 918 states and 2251 transitions. [2021-08-12 19:21:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:21:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:09,313 INFO L225 Difference]: With dead ends: 918 [2021-08-12 19:21:09,313 INFO L226 Difference]: Without dead ends: 852 [2021-08-12 19:21:09,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:21:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-12 19:21:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 756. [2021-08-12 19:21:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-08-12 19:21:09,437 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 28 [2021-08-12 19:21:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:09,437 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-08-12 19:21:09,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-08-12 19:21:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:09,438 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:09,439 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:09,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:09,639 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 70 times [2021-08-12 19:21:09,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:09,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433215714] [2021-08-12 19:21:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:09,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:09,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433215714] [2021-08-12 19:21:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433215714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:09,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005684293] [2021-08-12 19:21:09,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:09,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:10,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005684293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:10,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:10,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:10,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913212171] [2021-08-12 19:21:10,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:10,017 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:10,639 INFO L93 Difference]: Finished difference Result 870 states and 2131 transitions. [2021-08-12 19:21:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:21:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:10,642 INFO L225 Difference]: With dead ends: 870 [2021-08-12 19:21:10,642 INFO L226 Difference]: Without dead ends: 804 [2021-08-12 19:21:10,642 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:21:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-08-12 19:21:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 764. [2021-08-12 19:21:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.4600262123197902) internal successors, (1877), 763 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1877 transitions. [2021-08-12 19:21:10,761 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1877 transitions. Word has length 28 [2021-08-12 19:21:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:10,761 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 1877 transitions. [2021-08-12 19:21:10,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1877 transitions. [2021-08-12 19:21:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:10,762 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:10,762 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:10,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable814 [2021-08-12 19:21:10,965 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1978153802, now seen corresponding path program 71 times [2021-08-12 19:21:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467939847] [2021-08-12 19:21:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467939847] [2021-08-12 19:21:11,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467939847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806441018] [2021-08-12 19:21:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:11,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:21:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806441018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:11,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540252580] [2021-08-12 19:21:11,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:11,252 INFO L87 Difference]: Start difference. First operand 764 states and 1877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:12,016 INFO L93 Difference]: Finished difference Result 974 states and 2391 transitions. [2021-08-12 19:21:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:21:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:12,019 INFO L225 Difference]: With dead ends: 974 [2021-08-12 19:21:12,019 INFO L226 Difference]: Without dead ends: 908 [2021-08-12 19:21:12,019 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-08-12 19:21:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 780. [2021-08-12 19:21:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-08-12 19:21:12,149 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-08-12 19:21:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:12,149 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-08-12 19:21:12,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-08-12 19:21:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:21:12,151 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:12,151 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:12,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:12,365 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 72 times [2021-08-12 19:21:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751832704] [2021-08-12 19:21:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:12,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:12,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751832704] [2021-08-12 19:21:12,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751832704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:12,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655497558] [2021-08-12 19:21:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:12,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:21:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:21:12,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:12,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655497558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602610120] [2021-08-12 19:21:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:12,763 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:13,605 INFO L93 Difference]: Finished difference Result 926 states and 2267 transitions. [2021-08-12 19:21:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:21:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:13,608 INFO L225 Difference]: With dead ends: 926 [2021-08-12 19:21:13,608 INFO L226 Difference]: Without dead ends: 868 [2021-08-12 19:21:13,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-12 19:21:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 780. [2021-08-12 19:21:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-08-12 19:21:13,742 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-08-12 19:21:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:13,742 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-08-12 19:21:13,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-08-12 19:21:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:13,743 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:13,743 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:13,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:13,943 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 73 times [2021-08-12 19:21:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699820082] [2021-08-12 19:21:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:14,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699820082] [2021-08-12 19:21:14,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699820082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424526904] [2021-08-12 19:21:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424526904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:14,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190192321] [2021-08-12 19:21:14,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:14,425 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:15,298 INFO L93 Difference]: Finished difference Result 1052 states and 2521 transitions. [2021-08-12 19:21:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:21:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:15,301 INFO L225 Difference]: With dead ends: 1052 [2021-08-12 19:21:15,301 INFO L226 Difference]: Without dead ends: 994 [2021-08-12 19:21:15,301 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-12 19:21:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 824. [2021-08-12 19:21:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.4702308626974485) internal successors, (2033), 823 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2033 transitions. [2021-08-12 19:21:15,471 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2033 transitions. Word has length 30 [2021-08-12 19:21:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:15,471 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2033 transitions. [2021-08-12 19:21:15,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2033 transitions. [2021-08-12 19:21:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:15,472 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:15,472 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-08-12 19:21:15,672 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 74 times [2021-08-12 19:21:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484244266] [2021-08-12 19:21:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:15,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:15,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484244266] [2021-08-12 19:21:15,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484244266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:15,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44673547] [2021-08-12 19:21:15,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:15,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:15,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:15,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:15,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:16,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44673547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:16,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:16,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:16,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730199030] [2021-08-12 19:21:16,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:16,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:16,233 INFO L87 Difference]: Start difference. First operand 824 states and 2033 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:17,078 INFO L93 Difference]: Finished difference Result 1010 states and 2487 transitions. [2021-08-12 19:21:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:21:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:17,080 INFO L225 Difference]: With dead ends: 1010 [2021-08-12 19:21:17,080 INFO L226 Difference]: Without dead ends: 944 [2021-08-12 19:21:17,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:21:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-08-12 19:21:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 840. [2021-08-12 19:21:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.470798569725864) internal successors, (2073), 839 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2073 transitions. [2021-08-12 19:21:17,216 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2073 transitions. Word has length 30 [2021-08-12 19:21:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:17,216 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2073 transitions. [2021-08-12 19:21:17,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2073 transitions. [2021-08-12 19:21:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:17,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:17,218 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:17,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:17,418 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 75 times [2021-08-12 19:21:17,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:17,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007371539] [2021-08-12 19:21:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:17,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:17,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007371539] [2021-08-12 19:21:17,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007371539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:17,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257924871] [2021-08-12 19:21:17,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:17,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:21:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:17,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257924871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:17,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:17,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:17,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036286432] [2021-08-12 19:21:17,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:17,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:17,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:17,856 INFO L87 Difference]: Start difference. First operand 840 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:18,947 INFO L93 Difference]: Finished difference Result 1090 states and 2691 transitions. [2021-08-12 19:21:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:18,949 INFO L225 Difference]: With dead ends: 1090 [2021-08-12 19:21:18,949 INFO L226 Difference]: Without dead ends: 1016 [2021-08-12 19:21:18,950 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:21:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-08-12 19:21:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 856. [2021-08-12 19:21:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-08-12 19:21:19,121 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-08-12 19:21:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:19,121 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-08-12 19:21:19,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-08-12 19:21:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:19,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:19,123 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:19,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-08-12 19:21:19,323 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1390999484, now seen corresponding path program 76 times [2021-08-12 19:21:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:19,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381584107] [2021-08-12 19:21:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:19,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381584107] [2021-08-12 19:21:19,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381584107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583131094] [2021-08-12 19:21:19,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:19,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:19,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583131094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:19,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:19,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217309672] [2021-08-12 19:21:19,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:19,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:19,840 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:20,754 INFO L93 Difference]: Finished difference Result 1026 states and 2523 transitions. [2021-08-12 19:21:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:20,757 INFO L225 Difference]: With dead ends: 1026 [2021-08-12 19:21:20,757 INFO L226 Difference]: Without dead ends: 968 [2021-08-12 19:21:20,757 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-08-12 19:21:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 856. [2021-08-12 19:21:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-08-12 19:21:20,914 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-08-12 19:21:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:20,914 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-08-12 19:21:20,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-08-12 19:21:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:20,916 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:20,916 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:21,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-08-12 19:21:21,116 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 77 times [2021-08-12 19:21:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595102504] [2021-08-12 19:21:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595102504] [2021-08-12 19:21:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595102504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011517508] [2021-08-12 19:21:21,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:21,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:21:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:21,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011517508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:21,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:21,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871680031] [2021-08-12 19:21:21,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:21,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:21,571 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:22,664 INFO L93 Difference]: Finished difference Result 1146 states and 2831 transitions. [2021-08-12 19:21:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:21:22,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:22,667 INFO L225 Difference]: With dead ends: 1146 [2021-08-12 19:21:22,667 INFO L226 Difference]: Without dead ends: 1072 [2021-08-12 19:21:22,667 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-12 19:21:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 888. [2021-08-12 19:21:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.4723788049605413) internal successors, (2193), 887 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2193 transitions. [2021-08-12 19:21:22,828 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2193 transitions. Word has length 30 [2021-08-12 19:21:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:22,828 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2193 transitions. [2021-08-12 19:21:22,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2193 transitions. [2021-08-12 19:21:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:22,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:22,829 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:23,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-08-12 19:21:23,030 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 78 times [2021-08-12 19:21:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:23,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585671942] [2021-08-12 19:21:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585671942] [2021-08-12 19:21:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585671942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501832198] [2021-08-12 19:21:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:23,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:21:23,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:23,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501832198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:23,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:23,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:23,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058892427] [2021-08-12 19:21:23,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:23,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:23,584 INFO L87 Difference]: Start difference. First operand 888 states and 2193 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:24,731 INFO L93 Difference]: Finished difference Result 1194 states and 2947 transitions. [2021-08-12 19:21:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:24,734 INFO L225 Difference]: With dead ends: 1194 [2021-08-12 19:21:24,734 INFO L226 Difference]: Without dead ends: 1128 [2021-08-12 19:21:24,734 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-12 19:21:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 896. [2021-08-12 19:21:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.4726256983240225) internal successors, (2213), 895 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2213 transitions. [2021-08-12 19:21:24,903 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2213 transitions. Word has length 30 [2021-08-12 19:21:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:24,903 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2213 transitions. [2021-08-12 19:21:24,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2213 transitions. [2021-08-12 19:21:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:24,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:24,904 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:25,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-08-12 19:21:25,105 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 79 times [2021-08-12 19:21:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:25,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706161259] [2021-08-12 19:21:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:25,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706161259] [2021-08-12 19:21:25,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706161259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303792128] [2021-08-12 19:21:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:25,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303792128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:25,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:25,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959996638] [2021-08-12 19:21:25,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:25,726 INFO L87 Difference]: Start difference. First operand 896 states and 2213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:26,849 INFO L93 Difference]: Finished difference Result 1138 states and 2807 transitions. [2021-08-12 19:21:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:21:26,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:26,852 INFO L225 Difference]: With dead ends: 1138 [2021-08-12 19:21:26,852 INFO L226 Difference]: Without dead ends: 1072 [2021-08-12 19:21:26,852 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 888.5ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-12 19:21:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 928. [2021-08-12 19:21:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.4735706580366776) internal successors, (2293), 927 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2293 transitions. [2021-08-12 19:21:27,037 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2293 transitions. Word has length 30 [2021-08-12 19:21:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:27,038 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2293 transitions. [2021-08-12 19:21:27,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2293 transitions. [2021-08-12 19:21:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:27,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:27,039 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:27,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-08-12 19:21:27,241 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1967162948, now seen corresponding path program 80 times [2021-08-12 19:21:27,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:27,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807036598] [2021-08-12 19:21:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:27,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:27,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807036598] [2021-08-12 19:21:27,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807036598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:27,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181880001] [2021-08-12 19:21:27,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:27,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:27,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:27,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181880001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:27,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:27,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:27,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153236549] [2021-08-12 19:21:27,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:27,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:27,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:27,768 INFO L87 Difference]: Start difference. First operand 928 states and 2293 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:29,129 INFO L93 Difference]: Finished difference Result 1210 states and 2987 transitions. [2021-08-12 19:21:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:21:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:29,132 INFO L225 Difference]: With dead ends: 1210 [2021-08-12 19:21:29,132 INFO L226 Difference]: Without dead ends: 1144 [2021-08-12 19:21:29,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-12 19:21:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 944. [2021-08-12 19:21:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.4740190880169672) internal successors, (2333), 943 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2333 transitions. [2021-08-12 19:21:29,316 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2333 transitions. Word has length 30 [2021-08-12 19:21:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:29,316 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2333 transitions. [2021-08-12 19:21:29,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2333 transitions. [2021-08-12 19:21:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:29,318 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:29,318 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:29,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-08-12 19:21:29,518 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 81 times [2021-08-12 19:21:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:29,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177373120] [2021-08-12 19:21:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:29,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177373120] [2021-08-12 19:21:29,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177373120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151014541] [2021-08-12 19:21:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:21:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:30,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151014541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:30,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:30,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:30,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656007854] [2021-08-12 19:21:30,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:30,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:30,046 INFO L87 Difference]: Start difference. First operand 944 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:31,300 INFO L93 Difference]: Finished difference Result 1320 states and 3222 transitions. [2021-08-12 19:21:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:21:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:31,303 INFO L225 Difference]: With dead ends: 1320 [2021-08-12 19:21:31,303 INFO L226 Difference]: Without dead ends: 1254 [2021-08-12 19:21:31,303 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-08-12 19:21:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 992. [2021-08-12 19:21:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.4752774974772955) internal successors, (2453), 991 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2453 transitions. [2021-08-12 19:21:31,504 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2453 transitions. Word has length 30 [2021-08-12 19:21:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:31,504 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 2453 transitions. [2021-08-12 19:21:31,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2453 transitions. [2021-08-12 19:21:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:31,505 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:31,505 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:31,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-08-12 19:21:31,706 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1109773824, now seen corresponding path program 82 times [2021-08-12 19:21:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:31,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146860554] [2021-08-12 19:21:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:31,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146860554] [2021-08-12 19:21:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146860554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964801714] [2021-08-12 19:21:31,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:31,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964801714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:32,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685400810] [2021-08-12 19:21:32,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:32,305 INFO L87 Difference]: Start difference. First operand 992 states and 2453 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:33,688 INFO L93 Difference]: Finished difference Result 1258 states and 3107 transitions. [2021-08-12 19:21:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:33,691 INFO L225 Difference]: With dead ends: 1258 [2021-08-12 19:21:33,691 INFO L226 Difference]: Without dead ends: 1192 [2021-08-12 19:21:33,691 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 908.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-08-12 19:21:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1016. [2021-08-12 19:21:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.475862068965517) internal successors, (2513), 1015 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2513 transitions. [2021-08-12 19:21:33,898 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2513 transitions. Word has length 30 [2021-08-12 19:21:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:33,898 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2513 transitions. [2021-08-12 19:21:33,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2513 transitions. [2021-08-12 19:21:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:33,899 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:33,899 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:34,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:34,100 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 83 times [2021-08-12 19:21:34,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:34,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999194727] [2021-08-12 19:21:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:34,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:34,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999194727] [2021-08-12 19:21:34,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999194727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:34,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764392602] [2021-08-12 19:21:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:34,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:21:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:34,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764392602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:34,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:34,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:34,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974307646] [2021-08-12 19:21:34,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:34,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:34,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:34,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:34,676 INFO L87 Difference]: Start difference. First operand 1016 states and 2513 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:35,999 INFO L93 Difference]: Finished difference Result 1338 states and 3307 transitions. [2021-08-12 19:21:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:21:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:36,002 INFO L225 Difference]: With dead ends: 1338 [2021-08-12 19:21:36,002 INFO L226 Difference]: Without dead ends: 1272 [2021-08-12 19:21:36,002 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-12 19:21:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1040. [2021-08-12 19:21:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.4764196342637153) internal successors, (2573), 1039 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2573 transitions. [2021-08-12 19:21:36,219 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2573 transitions. Word has length 30 [2021-08-12 19:21:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:36,219 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2573 transitions. [2021-08-12 19:21:36,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2573 transitions. [2021-08-12 19:21:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:36,221 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:36,221 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:36,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-08-12 19:21:36,421 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 84 times [2021-08-12 19:21:36,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:36,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120468235] [2021-08-12 19:21:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:36,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:36,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120468235] [2021-08-12 19:21:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120468235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:36,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388963574] [2021-08-12 19:21:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:36,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:21:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:36,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388963574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:36,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:36,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:36,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169237111] [2021-08-12 19:21:36,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:36,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:36,928 INFO L87 Difference]: Start difference. First operand 1040 states and 2573 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:38,346 INFO L93 Difference]: Finished difference Result 1354 states and 3347 transitions. [2021-08-12 19:21:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:21:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:38,349 INFO L225 Difference]: With dead ends: 1354 [2021-08-12 19:21:38,349 INFO L226 Difference]: Without dead ends: 1288 [2021-08-12 19:21:38,350 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:21:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-12 19:21:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1048. [2021-08-12 19:21:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.4765998089780323) internal successors, (2593), 1047 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2593 transitions. [2021-08-12 19:21:38,577 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2593 transitions. Word has length 30 [2021-08-12 19:21:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:38,577 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2593 transitions. [2021-08-12 19:21:38,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2593 transitions. [2021-08-12 19:21:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:38,578 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:38,579 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:38,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-08-12 19:21:38,779 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2010082424, now seen corresponding path program 85 times [2021-08-12 19:21:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:38,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153064312] [2021-08-12 19:21:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:38,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:38,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153064312] [2021-08-12 19:21:38,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153064312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:38,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666677035] [2021-08-12 19:21:38,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666677035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:39,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:39,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204794258] [2021-08-12 19:21:39,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:39,356 INFO L87 Difference]: Start difference. First operand 1048 states and 2593 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:41,228 INFO L93 Difference]: Finished difference Result 1528 states and 3742 transitions. [2021-08-12 19:21:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:21:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:41,231 INFO L225 Difference]: With dead ends: 1528 [2021-08-12 19:21:41,231 INFO L226 Difference]: Without dead ends: 1462 [2021-08-12 19:21:41,231 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1161.0ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:21:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-08-12 19:21:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1152. [2021-08-12 19:21:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.4787141615986097) internal successors, (2853), 1151 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2853 transitions. [2021-08-12 19:21:41,490 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2853 transitions. Word has length 30 [2021-08-12 19:21:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:41,490 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2853 transitions. [2021-08-12 19:21:41,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2853 transitions. [2021-08-12 19:21:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:41,492 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:41,492 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:41,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:41,692 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1947238460, now seen corresponding path program 86 times [2021-08-12 19:21:41,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:41,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738949829] [2021-08-12 19:21:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:41,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738949829] [2021-08-12 19:21:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738949829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105858823] [2021-08-12 19:21:41,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:41,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:41,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:42,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105858823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:42,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599572689] [2021-08-12 19:21:42,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:42,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:42,061 INFO L87 Difference]: Start difference. First operand 1152 states and 2853 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:43,364 INFO L93 Difference]: Finished difference Result 1322 states and 3267 transitions. [2021-08-12 19:21:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:21:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:43,367 INFO L225 Difference]: With dead ends: 1322 [2021-08-12 19:21:43,367 INFO L226 Difference]: Without dead ends: 1256 [2021-08-12 19:21:43,367 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-08-12 19:21:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1168. [2021-08-12 19:21:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.479005998286204) internal successors, (2893), 1167 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2893 transitions. [2021-08-12 19:21:43,643 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2893 transitions. Word has length 30 [2021-08-12 19:21:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:43,643 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2893 transitions. [2021-08-12 19:21:43,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2893 transitions. [2021-08-12 19:21:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:43,645 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:43,645 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:43,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-08-12 19:21:43,845 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 87 times [2021-08-12 19:21:43,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464596318] [2021-08-12 19:21:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:44,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:44,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464596318] [2021-08-12 19:21:44,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464596318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:44,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120164673] [2021-08-12 19:21:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:44,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:21:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:21:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:44,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120164673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:44,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:44,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:44,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414147972] [2021-08-12 19:21:44,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:44,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:44,291 INFO L87 Difference]: Start difference. First operand 1168 states and 2893 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:45,711 INFO L93 Difference]: Finished difference Result 1504 states and 3682 transitions. [2021-08-12 19:21:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:21:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:45,714 INFO L225 Difference]: With dead ends: 1504 [2021-08-12 19:21:45,714 INFO L226 Difference]: Without dead ends: 1438 [2021-08-12 19:21:45,714 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-08-12 19:21:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1192. [2021-08-12 19:21:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.479429051217464) internal successors, (2953), 1191 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2953 transitions. [2021-08-12 19:21:45,997 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2953 transitions. Word has length 30 [2021-08-12 19:21:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:45,997 INFO L482 AbstractCegarLoop]: Abstraction has 1192 states and 2953 transitions. [2021-08-12 19:21:45,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2953 transitions. [2021-08-12 19:21:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:45,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:45,999 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:46,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:46,199 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1991143168, now seen corresponding path program 88 times [2021-08-12 19:21:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:46,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604767759] [2021-08-12 19:21:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:46,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604767759] [2021-08-12 19:21:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604767759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735447780] [2021-08-12 19:21:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:46,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:46,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735447780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:46,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:46,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:46,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196416179] [2021-08-12 19:21:46,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:46,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:46,737 INFO L87 Difference]: Start difference. First operand 1192 states and 2953 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:48,159 INFO L93 Difference]: Finished difference Result 1386 states and 3423 transitions. [2021-08-12 19:21:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:21:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:48,162 INFO L225 Difference]: With dead ends: 1386 [2021-08-12 19:21:48,162 INFO L226 Difference]: Without dead ends: 1328 [2021-08-12 19:21:48,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 775.0ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-08-12 19:21:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1208. [2021-08-12 19:21:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-08-12 19:21:48,446 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-08-12 19:21:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:48,446 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-08-12 19:21:48,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-08-12 19:21:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:48,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:48,447 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:48,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-08-12 19:21:48,648 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash 260373436, now seen corresponding path program 89 times [2021-08-12 19:21:48,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:48,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309351024] [2021-08-12 19:21:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309351024] [2021-08-12 19:21:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309351024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390336355] [2021-08-12 19:21:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:48,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:21:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:48,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390336355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:49,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459953159] [2021-08-12 19:21:49,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:49,173 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:50,524 INFO L93 Difference]: Finished difference Result 1378 states and 3403 transitions. [2021-08-12 19:21:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:21:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:50,530 INFO L225 Difference]: With dead ends: 1378 [2021-08-12 19:21:50,530 INFO L226 Difference]: Without dead ends: 1320 [2021-08-12 19:21:50,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-08-12 19:21:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1200. [2021-08-12 19:21:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.479566305254379) internal successors, (2973), 1199 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2973 transitions. [2021-08-12 19:21:50,819 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2973 transitions. Word has length 30 [2021-08-12 19:21:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:50,819 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2973 transitions. [2021-08-12 19:21:50,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2973 transitions. [2021-08-12 19:21:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:50,821 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:50,821 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:51,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1091 [2021-08-12 19:21:51,025 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 90 times [2021-08-12 19:21:51,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:51,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396949005] [2021-08-12 19:21:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:51,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:51,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396949005] [2021-08-12 19:21:51,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396949005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:51,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698804925] [2021-08-12 19:21:51,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:51,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:21:51,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698804925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:51,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276311005] [2021-08-12 19:21:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:51,445 INFO L87 Difference]: Start difference. First operand 1200 states and 2973 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:52,999 INFO L93 Difference]: Finished difference Result 1434 states and 3547 transitions. [2021-08-12 19:21:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:21:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:53,002 INFO L225 Difference]: With dead ends: 1434 [2021-08-12 19:21:53,002 INFO L226 Difference]: Without dead ends: 1368 [2021-08-12 19:21:53,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:21:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-08-12 19:21:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1208. [2021-08-12 19:21:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-08-12 19:21:53,290 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-08-12 19:21:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:53,290 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-08-12 19:21:53,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-08-12 19:21:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:53,291 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:53,292 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:53,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-08-12 19:21:53,492 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 70439040, now seen corresponding path program 91 times [2021-08-12 19:21:53,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:53,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58298359] [2021-08-12 19:21:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:53,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:53,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58298359] [2021-08-12 19:21:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58298359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:53,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465138058] [2021-08-12 19:21:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:54,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465138058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:54,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:54,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:54,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853984806] [2021-08-12 19:21:54,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:54,033 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:55,698 INFO L93 Difference]: Finished difference Result 1498 states and 3707 transitions. [2021-08-12 19:21:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:21:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:55,701 INFO L225 Difference]: With dead ends: 1498 [2021-08-12 19:21:55,701 INFO L226 Difference]: Without dead ends: 1432 [2021-08-12 19:21:55,701 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 868.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:21:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-08-12 19:21:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1240. [2021-08-12 19:21:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.480225988700565) internal successors, (3073), 1239 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3073 transitions. [2021-08-12 19:21:56,029 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3073 transitions. Word has length 30 [2021-08-12 19:21:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:56,030 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 3073 transitions. [2021-08-12 19:21:56,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3073 transitions. [2021-08-12 19:21:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:56,031 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:56,031 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:56,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:56,231 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1329577404, now seen corresponding path program 92 times [2021-08-12 19:21:56,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:56,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061637954] [2021-08-12 19:21:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:56,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061637954] [2021-08-12 19:21:56,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061637954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292522634] [2021-08-12 19:21:56,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:56,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:56,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:56,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292522634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:56,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:56,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925699293] [2021-08-12 19:21:56,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:56,751 INFO L87 Difference]: Start difference. First operand 1240 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:58,573 INFO L93 Difference]: Finished difference Result 1870 states and 4613 transitions. [2021-08-12 19:21:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:21:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:58,577 INFO L225 Difference]: With dead ends: 1870 [2021-08-12 19:21:58,577 INFO L226 Difference]: Without dead ends: 1776 [2021-08-12 19:21:58,577 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 769.3ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:21:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-08-12 19:21:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1360. [2021-08-12 19:21:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.487858719646799) internal successors, (3381), 1359 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3381 transitions. [2021-08-12 19:21:58,928 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3381 transitions. Word has length 30 [2021-08-12 19:21:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:58,928 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3381 transitions. [2021-08-12 19:21:58,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3381 transitions. [2021-08-12 19:21:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:21:58,929 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:58,929 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:59,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:59,130 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1619222852, now seen corresponding path program 93 times [2021-08-12 19:21:59,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:59,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99987528] [2021-08-12 19:21:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99987528] [2021-08-12 19:21:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99987528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521202643] [2021-08-12 19:21:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:59,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:21:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:21:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521202643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:59,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:21:59,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559982004] [2021-08-12 19:21:59,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:21:59,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:21:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:21:59,602 INFO L87 Difference]: Start difference. First operand 1360 states and 3381 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:01,183 INFO L93 Difference]: Finished difference Result 1610 states and 3995 transitions. [2021-08-12 19:22:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:22:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:01,187 INFO L225 Difference]: With dead ends: 1610 [2021-08-12 19:22:01,187 INFO L226 Difference]: Without dead ends: 1544 [2021-08-12 19:22:01,187 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:22:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-12 19:22:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1376. [2021-08-12 19:22:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.488) internal successors, (3421), 1375 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3421 transitions. [2021-08-12 19:22:01,531 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3421 transitions. Word has length 30 [2021-08-12 19:22:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:01,531 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 3421 transitions. [2021-08-12 19:22:01,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3421 transitions. [2021-08-12 19:22:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:01,533 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:01,533 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:01,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-08-12 19:22:01,733 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 94 times [2021-08-12 19:22:01,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:01,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661708939] [2021-08-12 19:22:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:01,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661708939] [2021-08-12 19:22:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661708939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323590209] [2021-08-12 19:22:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:01,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:02,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323590209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:02,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:02,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:02,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836790613] [2021-08-12 19:22:02,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:02,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:02,197 INFO L87 Difference]: Start difference. First operand 1376 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:03,960 INFO L93 Difference]: Finished difference Result 1682 states and 4179 transitions. [2021-08-12 19:22:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:03,964 INFO L225 Difference]: With dead ends: 1682 [2021-08-12 19:22:03,964 INFO L226 Difference]: Without dead ends: 1608 [2021-08-12 19:22:03,965 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:22:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-08-12 19:22:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1384. [2021-08-12 19:22:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.488069414316703) internal successors, (3441), 1383 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3441 transitions. [2021-08-12 19:22:04,322 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3441 transitions. Word has length 30 [2021-08-12 19:22:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:04,322 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 3441 transitions. [2021-08-12 19:22:04,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3441 transitions. [2021-08-12 19:22:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:04,323 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:04,323 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-08-12 19:22:04,524 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1217793912, now seen corresponding path program 95 times [2021-08-12 19:22:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:04,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781865713] [2021-08-12 19:22:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:04,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:04,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781865713] [2021-08-12 19:22:04,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781865713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:04,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290247673] [2021-08-12 19:22:04,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:04,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:22:04,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:04,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290247673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064316734] [2021-08-12 19:22:04,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:04,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:04,994 INFO L87 Difference]: Start difference. First operand 1384 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:06,651 INFO L93 Difference]: Finished difference Result 1666 states and 4139 transitions. [2021-08-12 19:22:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:22:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:06,655 INFO L225 Difference]: With dead ends: 1666 [2021-08-12 19:22:06,655 INFO L226 Difference]: Without dead ends: 1592 [2021-08-12 19:22:06,655 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:22:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-08-12 19:22:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1392. [2021-08-12 19:22:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.488138030194105) internal successors, (3461), 1391 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 3461 transitions. [2021-08-12 19:22:07,012 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 3461 transitions. Word has length 30 [2021-08-12 19:22:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:07,012 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 3461 transitions. [2021-08-12 19:22:07,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 3461 transitions. [2021-08-12 19:22:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:07,013 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:07,013 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:07,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-08-12 19:22:07,214 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash 879456376, now seen corresponding path program 96 times [2021-08-12 19:22:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:07,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178869254] [2021-08-12 19:22:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:07,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:07,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178869254] [2021-08-12 19:22:07,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178869254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:07,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913251904] [2021-08-12 19:22:07,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:07,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:22:07,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:07,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:07,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913251904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:07,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:07,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:07,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002028246] [2021-08-12 19:22:07,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:07,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:07,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:07,718 INFO L87 Difference]: Start difference. First operand 1392 states and 3461 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:09,286 INFO L93 Difference]: Finished difference Result 1700 states and 4184 transitions. [2021-08-12 19:22:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:09,290 INFO L225 Difference]: With dead ends: 1700 [2021-08-12 19:22:09,290 INFO L226 Difference]: Without dead ends: 1622 [2021-08-12 19:22:09,290 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:22:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-08-12 19:22:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1424. [2021-08-12 19:22:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.488404778636683) internal successors, (3541), 1423 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3541 transitions. [2021-08-12 19:22:09,669 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3541 transitions. Word has length 30 [2021-08-12 19:22:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:09,669 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3541 transitions. [2021-08-12 19:22:09,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3541 transitions. [2021-08-12 19:22:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:09,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:09,670 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:09,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-08-12 19:22:09,871 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash -851313356, now seen corresponding path program 97 times [2021-08-12 19:22:09,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:09,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238354377] [2021-08-12 19:22:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238354377] [2021-08-12 19:22:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238354377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24120245] [2021-08-12 19:22:10,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24120245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:10,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:10,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402513959] [2021-08-12 19:22:10,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:10,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:10,348 INFO L87 Difference]: Start difference. First operand 1424 states and 3541 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:12,191 INFO L93 Difference]: Finished difference Result 1810 states and 4459 transitions. [2021-08-12 19:22:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:12,194 INFO L225 Difference]: With dead ends: 1810 [2021-08-12 19:22:12,196 INFO L226 Difference]: Without dead ends: 1744 [2021-08-12 19:22:12,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:22:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-08-12 19:22:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1432. [2021-08-12 19:22:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.488469601677149) internal successors, (3561), 1431 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3561 transitions. [2021-08-12 19:22:12,568 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3561 transitions. Word has length 30 [2021-08-12 19:22:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:12,568 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 3561 transitions. [2021-08-12 19:22:12,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3561 transitions. [2021-08-12 19:22:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:12,569 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:12,569 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:12,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-08-12 19:22:12,769 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:12,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 98 times [2021-08-12 19:22:12,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:12,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030560609] [2021-08-12 19:22:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:12,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:12,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030560609] [2021-08-12 19:22:12,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030560609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:12,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533654866] [2021-08-12 19:22:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:12,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:13,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533654866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:13,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:13,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:13,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216813179] [2021-08-12 19:22:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:13,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:13,233 INFO L87 Difference]: Start difference. First operand 1432 states and 3561 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:14,926 INFO L93 Difference]: Finished difference Result 1682 states and 4175 transitions. [2021-08-12 19:22:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:22:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:14,931 INFO L225 Difference]: With dead ends: 1682 [2021-08-12 19:22:14,931 INFO L226 Difference]: Without dead ends: 1616 [2021-08-12 19:22:14,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:22:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-08-12 19:22:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1464. [2021-08-12 19:22:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-08-12 19:22:15,329 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-08-12 19:22:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:15,329 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-08-12 19:22:15,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-08-12 19:22:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:15,330 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:15,331 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:15,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-08-12 19:22:15,531 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 99 times [2021-08-12 19:22:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:15,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640387406] [2021-08-12 19:22:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:15,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640387406] [2021-08-12 19:22:15,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640387406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661828888] [2021-08-12 19:22:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:15,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:22:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661828888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:15,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:15,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763529464] [2021-08-12 19:22:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:15,996 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:17,684 INFO L93 Difference]: Finished difference Result 1722 states and 4275 transitions. [2021-08-12 19:22:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:22:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:17,687 INFO L225 Difference]: With dead ends: 1722 [2021-08-12 19:22:17,687 INFO L226 Difference]: Without dead ends: 1656 [2021-08-12 19:22:17,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:22:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-08-12 19:22:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1464. [2021-08-12 19:22:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-08-12 19:22:18,088 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-08-12 19:22:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:18,088 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-08-12 19:22:18,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-08-12 19:22:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:18,089 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:18,089 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:18,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1256,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:18,290 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:18,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 100 times [2021-08-12 19:22:18,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:18,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640176287] [2021-08-12 19:22:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:18,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640176287] [2021-08-12 19:22:18,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640176287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981225258] [2021-08-12 19:22:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:18,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:18,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981225258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:18,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:18,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:18,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070628119] [2021-08-12 19:22:18,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:18,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:18,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:18,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:18,877 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:20,748 INFO L93 Difference]: Finished difference Result 1714 states and 4255 transitions. [2021-08-12 19:22:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:22:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:20,752 INFO L225 Difference]: With dead ends: 1714 [2021-08-12 19:22:20,752 INFO L226 Difference]: Without dead ends: 1648 [2021-08-12 19:22:20,752 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:22:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-08-12 19:22:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1472. [2021-08-12 19:22:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.488783140720598) internal successors, (3661), 1471 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 3661 transitions. [2021-08-12 19:22:21,158 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 3661 transitions. Word has length 30 [2021-08-12 19:22:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:21,158 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 3661 transitions. [2021-08-12 19:22:21,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 3661 transitions. [2021-08-12 19:22:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:21,160 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:21,160 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:21,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-08-12 19:22:21,360 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash 848281916, now seen corresponding path program 101 times [2021-08-12 19:22:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:21,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492882973] [2021-08-12 19:22:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:21,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492882973] [2021-08-12 19:22:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492882973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32918000] [2021-08-12 19:22:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:21,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:22:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:21,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32918000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:21,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168835970] [2021-08-12 19:22:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:21,871 INFO L87 Difference]: Start difference. First operand 1472 states and 3661 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:23,918 INFO L93 Difference]: Finished difference Result 1880 states and 4630 transitions. [2021-08-12 19:22:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:22:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:23,923 INFO L225 Difference]: With dead ends: 1880 [2021-08-12 19:22:23,924 INFO L226 Difference]: Without dead ends: 1814 [2021-08-12 19:22:23,924 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:22:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-08-12 19:22:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1496. [2021-08-12 19:22:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.488963210702341) internal successors, (3721), 1495 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3721 transitions. [2021-08-12 19:22:24,343 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3721 transitions. Word has length 30 [2021-08-12 19:22:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:24,344 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3721 transitions. [2021-08-12 19:22:24,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3721 transitions. [2021-08-12 19:22:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:24,345 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:24,345 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:24,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:24,545 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 204964284, now seen corresponding path program 102 times [2021-08-12 19:22:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:24,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18169498] [2021-08-12 19:22:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:24,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:24,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18169498] [2021-08-12 19:22:24,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18169498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:24,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787612633] [2021-08-12 19:22:24,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:24,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:22:24,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:24,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787612633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:24,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:24,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037254229] [2021-08-12 19:22:24,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:24,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:24,919 INFO L87 Difference]: Start difference. First operand 1496 states and 3721 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:26,681 INFO L93 Difference]: Finished difference Result 1818 states and 4479 transitions. [2021-08-12 19:22:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:22:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:26,684 INFO L225 Difference]: With dead ends: 1818 [2021-08-12 19:22:26,685 INFO L226 Difference]: Without dead ends: 1744 [2021-08-12 19:22:26,685 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:22:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-08-12 19:22:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1536. [2021-08-12 19:22:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-08-12 19:22:27,115 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-08-12 19:22:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:27,115 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-08-12 19:22:27,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-08-12 19:22:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:27,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:27,117 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:27,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-08-12 19:22:27,317 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1072422212, now seen corresponding path program 103 times [2021-08-12 19:22:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:27,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646931492] [2021-08-12 19:22:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:27,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:27,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646931492] [2021-08-12 19:22:27,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646931492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:27,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045786200] [2021-08-12 19:22:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:27,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045786200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:27,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:27,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670799150] [2021-08-12 19:22:27,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:27,755 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:29,599 INFO L93 Difference]: Finished difference Result 1706 states and 4235 transitions. [2021-08-12 19:22:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:29,609 INFO L225 Difference]: With dead ends: 1706 [2021-08-12 19:22:29,609 INFO L226 Difference]: Without dead ends: 1640 [2021-08-12 19:22:29,610 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:22:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-08-12 19:22:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1536. [2021-08-12 19:22:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-08-12 19:22:30,052 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-08-12 19:22:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:30,052 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-08-12 19:22:30,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-08-12 19:22:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:30,054 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:30,054 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:30,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-08-12 19:22:30,254 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176184, now seen corresponding path program 104 times [2021-08-12 19:22:30,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:30,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90763848] [2021-08-12 19:22:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:30,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90763848] [2021-08-12 19:22:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90763848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445914353] [2021-08-12 19:22:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:30,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:30,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:30,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:30,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445914353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:30,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:30,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:30,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262765165] [2021-08-12 19:22:30,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:30,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:30,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:30,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:30,723 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:32,836 INFO L93 Difference]: Finished difference Result 1898 states and 4723 transitions. [2021-08-12 19:22:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:22:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:32,839 INFO L225 Difference]: With dead ends: 1898 [2021-08-12 19:22:32,839 INFO L226 Difference]: Without dead ends: 1824 [2021-08-12 19:22:32,840 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:22:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-08-12 19:22:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1528. [2021-08-12 19:22:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.4891944990176817) internal successors, (3801), 1527 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3801 transitions. [2021-08-12 19:22:33,294 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3801 transitions. Word has length 30 [2021-08-12 19:22:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:33,294 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 3801 transitions. [2021-08-12 19:22:33,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3801 transitions. [2021-08-12 19:22:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:33,295 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:33,295 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1337 [2021-08-12 19:22:33,497 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 105 times [2021-08-12 19:22:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425467905] [2021-08-12 19:22:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:33,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425467905] [2021-08-12 19:22:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425467905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264891187] [2021-08-12 19:22:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:22:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264891187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454504948] [2021-08-12 19:22:33,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:33,968 INFO L87 Difference]: Start difference. First operand 1528 states and 3801 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:36,152 INFO L93 Difference]: Finished difference Result 1842 states and 4575 transitions. [2021-08-12 19:22:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:36,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:36,156 INFO L225 Difference]: With dead ends: 1842 [2021-08-12 19:22:36,156 INFO L226 Difference]: Without dead ends: 1776 [2021-08-12 19:22:36,156 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:22:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-08-12 19:22:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1536. [2021-08-12 19:22:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-08-12 19:22:36,614 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-08-12 19:22:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:36,614 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-08-12 19:22:36,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-08-12 19:22:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:36,615 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:36,616 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:36,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:36,816 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1255775796, now seen corresponding path program 106 times [2021-08-12 19:22:36,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:36,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543324311] [2021-08-12 19:22:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:36,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:36,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543324311] [2021-08-12 19:22:36,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543324311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:36,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33074296] [2021-08-12 19:22:36,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:36,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:37,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33074296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:37,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:37,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889913833] [2021-08-12 19:22:37,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:37,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:37,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:37,325 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:39,422 INFO L93 Difference]: Finished difference Result 1978 states and 4875 transitions. [2021-08-12 19:22:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:39,425 INFO L225 Difference]: With dead ends: 1978 [2021-08-12 19:22:39,425 INFO L226 Difference]: Without dead ends: 1912 [2021-08-12 19:22:39,426 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:22:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-08-12 19:22:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1560. [2021-08-12 19:22:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 2.4894162924951893) internal successors, (3881), 1559 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3881 transitions. [2021-08-12 19:22:39,902 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3881 transitions. Word has length 30 [2021-08-12 19:22:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:39,902 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 3881 transitions. [2021-08-12 19:22:39,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3881 transitions. [2021-08-12 19:22:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:39,903 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:39,904 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:40,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-08-12 19:22:40,104 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 107 times [2021-08-12 19:22:40,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:40,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140650683] [2021-08-12 19:22:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:40,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:40,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140650683] [2021-08-12 19:22:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140650683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:40,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934234575] [2021-08-12 19:22:40,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:40,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:22:40,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:40,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:40,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:40,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934234575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:40,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:40,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403943919] [2021-08-12 19:22:40,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:40,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:40,575 INFO L87 Difference]: Start difference. First operand 1560 states and 3881 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:42,522 INFO L93 Difference]: Finished difference Result 1818 states and 4519 transitions. [2021-08-12 19:22:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:42,526 INFO L225 Difference]: With dead ends: 1818 [2021-08-12 19:22:42,526 INFO L226 Difference]: Without dead ends: 1752 [2021-08-12 19:22:42,526 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 632.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:22:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-08-12 19:22:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1576. [2021-08-12 19:22:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-08-12 19:22:43,042 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-08-12 19:22:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:43,042 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-08-12 19:22:43,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-08-12 19:22:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:43,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:43,044 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:43,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:43,244 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1862466628, now seen corresponding path program 108 times [2021-08-12 19:22:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219738537] [2021-08-12 19:22:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:43,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219738537] [2021-08-12 19:22:43,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219738537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745891738] [2021-08-12 19:22:43,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:43,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:22:43,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745891738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:43,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:43,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487249959] [2021-08-12 19:22:43,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:43,651 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:45,381 INFO L93 Difference]: Finished difference Result 1738 states and 4315 transitions. [2021-08-12 19:22:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:22:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:45,386 INFO L225 Difference]: With dead ends: 1738 [2021-08-12 19:22:45,386 INFO L226 Difference]: Without dead ends: 1672 [2021-08-12 19:22:45,386 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:22:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-08-12 19:22:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1576. [2021-08-12 19:22:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-08-12 19:22:45,904 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-08-12 19:22:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:45,904 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-08-12 19:22:45,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-08-12 19:22:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:45,906 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:45,906 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:46,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1414 [2021-08-12 19:22:46,106 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 109 times [2021-08-12 19:22:46,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:46,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141840757] [2021-08-12 19:22:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:46,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141840757] [2021-08-12 19:22:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141840757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884133805] [2021-08-12 19:22:46,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:46,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884133805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:46,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:46,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:46,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571806141] [2021-08-12 19:22:46,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:46,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:46,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:46,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:46,509 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:48,641 INFO L93 Difference]: Finished difference Result 1834 states and 4555 transitions. [2021-08-12 19:22:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:22:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:48,645 INFO L225 Difference]: With dead ends: 1834 [2021-08-12 19:22:48,645 INFO L226 Difference]: Without dead ends: 1768 [2021-08-12 19:22:48,645 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:22:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-08-12 19:22:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1584. [2021-08-12 19:22:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4895767530006316) internal successors, (3941), 1583 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3941 transitions. [2021-08-12 19:22:49,137 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3941 transitions. Word has length 30 [2021-08-12 19:22:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:49,137 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 3941 transitions. [2021-08-12 19:22:49,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3941 transitions. [2021-08-12 19:22:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:49,138 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:49,138 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:49,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:49,339 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024460, now seen corresponding path program 110 times [2021-08-12 19:22:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:49,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992970116] [2021-08-12 19:22:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:49,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:49,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992970116] [2021-08-12 19:22:49,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992970116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:49,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867925893] [2021-08-12 19:22:49,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:49,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:49,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:49,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867925893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:49,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:49,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:49,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863503174] [2021-08-12 19:22:49,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:49,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:49,788 INFO L87 Difference]: Start difference. First operand 1584 states and 3941 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:52,047 INFO L93 Difference]: Finished difference Result 1930 states and 4755 transitions. [2021-08-12 19:22:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:22:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:52,051 INFO L225 Difference]: With dead ends: 1930 [2021-08-12 19:22:52,051 INFO L226 Difference]: Without dead ends: 1864 [2021-08-12 19:22:52,051 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:22:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-08-12 19:22:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1600. [2021-08-12 19:22:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4896810506566602) internal successors, (3981), 1599 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3981 transitions. [2021-08-12 19:22:52,559 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3981 transitions. Word has length 30 [2021-08-12 19:22:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:52,559 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3981 transitions. [2021-08-12 19:22:52,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3981 transitions. [2021-08-12 19:22:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:52,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:52,561 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:52,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-08-12 19:22:52,761 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash -300592264, now seen corresponding path program 111 times [2021-08-12 19:22:52,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:52,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204584165] [2021-08-12 19:22:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:52,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204584165] [2021-08-12 19:22:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204584165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122707306] [2021-08-12 19:22:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:52,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:22:52,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:53,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122707306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:53,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:53,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100379743] [2021-08-12 19:22:53,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:53,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:53,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:53,181 INFO L87 Difference]: Start difference. First operand 1600 states and 3981 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:55,358 INFO L93 Difference]: Finished difference Result 2044 states and 5048 transitions. [2021-08-12 19:22:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:22:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:55,361 INFO L225 Difference]: With dead ends: 2044 [2021-08-12 19:22:55,361 INFO L226 Difference]: Without dead ends: 1958 [2021-08-12 19:22:55,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:22:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-12 19:22:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1640. [2021-08-12 19:22:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 2.48993288590604) internal successors, (4081), 1639 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4081 transitions. [2021-08-12 19:22:55,921 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4081 transitions. Word has length 30 [2021-08-12 19:22:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:55,921 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 4081 transitions. [2021-08-12 19:22:55,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4081 transitions. [2021-08-12 19:22:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:55,922 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:55,923 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:56,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-08-12 19:22:56,123 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2031361996, now seen corresponding path program 112 times [2021-08-12 19:22:56,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:56,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890141187] [2021-08-12 19:22:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:56,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890141187] [2021-08-12 19:22:56,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890141187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864576711] [2021-08-12 19:22:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:56,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:56,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864576711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:56,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:56,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:22:56,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853372648] [2021-08-12 19:22:56,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:22:56,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:56,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:22:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:22:56,546 INFO L87 Difference]: Start difference. First operand 1640 states and 4081 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:58,870 INFO L93 Difference]: Finished difference Result 2066 states and 5099 transitions. [2021-08-12 19:22:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:22:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:58,875 INFO L225 Difference]: With dead ends: 2066 [2021-08-12 19:22:58,875 INFO L226 Difference]: Without dead ends: 2000 [2021-08-12 19:22:58,875 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:22:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-08-12 19:22:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1648. [2021-08-12 19:22:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.4899817850637525) internal successors, (4101), 1647 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4101 transitions. [2021-08-12 19:22:59,406 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4101 transitions. Word has length 30 [2021-08-12 19:22:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:59,406 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 4101 transitions. [2021-08-12 19:22:59,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4101 transitions. [2021-08-12 19:22:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:22:59,407 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:59,407 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:59,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-08-12 19:22:59,608 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 113 times [2021-08-12 19:22:59,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:59,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312950436] [2021-08-12 19:22:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:59,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312950436] [2021-08-12 19:22:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312950436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073511588] [2021-08-12 19:22:59,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:22:59,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:22:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:22:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:00,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073511588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:00,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:00,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:23:00,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595406245] [2021-08-12 19:23:00,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:23:00,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:23:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:23:00,052 INFO L87 Difference]: Start difference. First operand 1648 states and 4101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:02,504 INFO L93 Difference]: Finished difference Result 2066 states and 5095 transitions. [2021-08-12 19:23:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:23:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:23:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:02,508 INFO L225 Difference]: With dead ends: 2066 [2021-08-12 19:23:02,508 INFO L226 Difference]: Without dead ends: 2000 [2021-08-12 19:23:02,508 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:23:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-08-12 19:23:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1672. [2021-08-12 19:23:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 2.490125673249551) internal successors, (4161), 1671 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 4161 transitions. [2021-08-12 19:23:03,061 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 4161 transitions. Word has length 30 [2021-08-12 19:23:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:03,062 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 4161 transitions. [2021-08-12 19:23:03,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 4161 transitions. [2021-08-12 19:23:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 19:23:03,063 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:03,063 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:03,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1493,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:03,264 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1490022136, now seen corresponding path program 4 times [2021-08-12 19:23:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288189286] [2021-08-12 19:23:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:03,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288189286] [2021-08-12 19:23:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288189286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486515115] [2021-08-12 19:23:03,635 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 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 [2021-08-12 19:23:03,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:23:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486515115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:03,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:03,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:23:03,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064738059] [2021-08-12 19:23:03,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:23:03,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:23:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:23:03,956 INFO L87 Difference]: Start difference. First operand 1672 states and 4161 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:05,934 INFO L93 Difference]: Finished difference Result 1810 states and 4503 transitions. [2021-08-12 19:23:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:23:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 19:23:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:05,938 INFO L225 Difference]: With dead ends: 1810 [2021-08-12 19:23:05,938 INFO L226 Difference]: Without dead ends: 1728 [2021-08-12 19:23:05,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:23:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-08-12 19:23:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1696. [2021-08-12 19:23:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.4902654867256637) internal successors, (4221), 1695 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4221 transitions. [2021-08-12 19:23:06,496 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4221 transitions. Word has length 30 [2021-08-12 19:23:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:06,496 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 4221 transitions. [2021-08-12 19:23:06,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4221 transitions. [2021-08-12 19:23:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:06,498 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:06,498 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:06,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-08-12 19:23:06,699 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 114 times [2021-08-12 19:23:06,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:06,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125304965] [2021-08-12 19:23:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:06,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:06,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125304965] [2021-08-12 19:23:06,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125304965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:06,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823464262] [2021-08-12 19:23:06,870 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 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 [2021-08-12 19:23:06,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:23:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:23:06,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823464262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382999945] [2021-08-12 19:23:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:07,170 INFO L87 Difference]: Start difference. First operand 1696 states and 4221 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:09,414 INFO L93 Difference]: Finished difference Result 1882 states and 4671 transitions. [2021-08-12 19:23:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:23:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:09,418 INFO L225 Difference]: With dead ends: 1882 [2021-08-12 19:23:09,418 INFO L226 Difference]: Without dead ends: 1824 [2021-08-12 19:23:09,418 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 711.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:23:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-08-12 19:23:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1704. [2021-08-12 19:23:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-08-12 19:23:09,977 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-08-12 19:23:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:09,977 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-08-12 19:23:09,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-08-12 19:23:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:09,978 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:09,978 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:10,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:10,179 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:10,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 115 times [2021-08-12 19:23:10,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:10,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421805463] [2021-08-12 19:23:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:10,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:10,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421805463] [2021-08-12 19:23:10,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421805463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:10,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342270143] [2021-08-12 19:23:10,435 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 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 [2021-08-12 19:23:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:10,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342270143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:10,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:10,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:10,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692585982] [2021-08-12 19:23:10,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:10,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:10,812 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:13,514 INFO L93 Difference]: Finished difference Result 1962 states and 4875 transitions. [2021-08-12 19:23:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:23:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:13,519 INFO L225 Difference]: With dead ends: 1962 [2021-08-12 19:23:13,519 INFO L226 Difference]: Without dead ends: 1896 [2021-08-12 19:23:13,519 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:23:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-08-12 19:23:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1704. [2021-08-12 19:23:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-08-12 19:23:14,091 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-08-12 19:23:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:14,091 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-08-12 19:23:14,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-08-12 19:23:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:14,093 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:14,093 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1535 [2021-08-12 19:23:14,309 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 116 times [2021-08-12 19:23:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836416580] [2021-08-12 19:23:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:14,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836416580] [2021-08-12 19:23:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836416580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:14,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818955232] [2021-08-12 19:23:14,660 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 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 [2021-08-12 19:23:14,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:15,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818955232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:15,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:15,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:15,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376222419] [2021-08-12 19:23:15,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:15,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:15,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:15,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:15,032 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:17,404 INFO L93 Difference]: Finished difference Result 1906 states and 4735 transitions. [2021-08-12 19:23:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:23:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:17,408 INFO L225 Difference]: With dead ends: 1906 [2021-08-12 19:23:17,408 INFO L226 Difference]: Without dead ends: 1840 [2021-08-12 19:23:17,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:23:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-08-12 19:23:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1720. [2021-08-12 19:23:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 2.4904013961605584) internal successors, (4281), 1719 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4281 transitions. [2021-08-12 19:23:18,020 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4281 transitions. Word has length 32 [2021-08-12 19:23:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:18,020 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 4281 transitions. [2021-08-12 19:23:18,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4281 transitions. [2021-08-12 19:23:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:18,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:18,022 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:18,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:18,223 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 117 times [2021-08-12 19:23:18,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:18,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586203811] [2021-08-12 19:23:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:18,583 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 7 [2021-08-12 19:23:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:18,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:18,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586203811] [2021-08-12 19:23:18,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586203811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:18,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228678141] [2021-08-12 19:23:18,645 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 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 [2021-08-12 19:23:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:23:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:19,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228678141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:19,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:19,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:19,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016036751] [2021-08-12 19:23:19,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:19,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:19,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:19,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:19,081 INFO L87 Difference]: Start difference. First operand 1720 states and 4281 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:21,732 INFO L93 Difference]: Finished difference Result 2058 states and 5119 transitions. [2021-08-12 19:23:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:23:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:21,737 INFO L225 Difference]: With dead ends: 2058 [2021-08-12 19:23:21,737 INFO L226 Difference]: Without dead ends: 1984 [2021-08-12 19:23:21,737 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:23:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-08-12 19:23:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1744. [2021-08-12 19:23:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.4905335628227196) internal successors, (4341), 1743 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4341 transitions. [2021-08-12 19:23:22,363 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4341 transitions. Word has length 32 [2021-08-12 19:23:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:22,363 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 4341 transitions. [2021-08-12 19:23:22,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4341 transitions. [2021-08-12 19:23:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:22,365 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:22,365 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:22,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-08-12 19:23:22,568 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 118 times [2021-08-12 19:23:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:22,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176609029] [2021-08-12 19:23:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:22,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176609029] [2021-08-12 19:23:22,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176609029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623847016] [2021-08-12 19:23:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:23:22,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:23,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623847016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:23,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:23,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:23,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020769344] [2021-08-12 19:23:23,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:23,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:23,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:23,272 INFO L87 Difference]: Start difference. First operand 1744 states and 4341 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:25,737 INFO L93 Difference]: Finished difference Result 1946 states and 4835 transitions. [2021-08-12 19:23:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:23:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:25,741 INFO L225 Difference]: With dead ends: 1946 [2021-08-12 19:23:25,741 INFO L226 Difference]: Without dead ends: 1880 [2021-08-12 19:23:25,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 967.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:23:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-08-12 19:23:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1752. [2021-08-12 19:23:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-08-12 19:23:26,376 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-08-12 19:23:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:26,376 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-08-12 19:23:26,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-08-12 19:23:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:26,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:26,378 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:26,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:26,578 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 119 times [2021-08-12 19:23:26,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:26,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173580402] [2021-08-12 19:23:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:26,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173580402] [2021-08-12 19:23:26,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173580402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25644169] [2021-08-12 19:23:26,752 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 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 [2021-08-12 19:23:26,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:23:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25644169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:27,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:27,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009509181] [2021-08-12 19:23:27,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:27,157 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:29,717 INFO L93 Difference]: Finished difference Result 1986 states and 4931 transitions. [2021-08-12 19:23:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:23:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:29,721 INFO L225 Difference]: With dead ends: 1986 [2021-08-12 19:23:29,721 INFO L226 Difference]: Without dead ends: 1928 [2021-08-12 19:23:29,721 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:23:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-12 19:23:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1752. [2021-08-12 19:23:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-08-12 19:23:30,345 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-08-12 19:23:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:30,345 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-08-12 19:23:30,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-08-12 19:23:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:30,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:30,347 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:30,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-08-12 19:23:30,561 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 120 times [2021-08-12 19:23:30,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:30,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379341953] [2021-08-12 19:23:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:30,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:30,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379341953] [2021-08-12 19:23:30,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379341953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:30,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212775837] [2021-08-12 19:23:30,881 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 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 [2021-08-12 19:23:30,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:23:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:31,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212775837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:31,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:31,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627688516] [2021-08-12 19:23:31,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:31,337 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:34,267 INFO L93 Difference]: Finished difference Result 1986 states and 4931 transitions. [2021-08-12 19:23:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:23:34,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:34,271 INFO L225 Difference]: With dead ends: 1986 [2021-08-12 19:23:34,271 INFO L226 Difference]: Without dead ends: 1928 [2021-08-12 19:23:34,271 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1211.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:23:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-12 19:23:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1776. [2021-08-12 19:23:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-08-12 19:23:34,915 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-08-12 19:23:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:34,915 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-08-12 19:23:34,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-08-12 19:23:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:34,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:34,917 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:35,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-08-12 19:23:35,140 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 121 times [2021-08-12 19:23:35,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:35,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569876015] [2021-08-12 19:23:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:35,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569876015] [2021-08-12 19:23:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569876015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456583888] [2021-08-12 19:23:35,322 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 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 [2021-08-12 19:23:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:35,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456583888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:35,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:35,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:35,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028827215] [2021-08-12 19:23:35,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:35,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:35,801 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:38,594 INFO L93 Difference]: Finished difference Result 1978 states and 4911 transitions. [2021-08-12 19:23:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:23:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:38,598 INFO L225 Difference]: With dead ends: 1978 [2021-08-12 19:23:38,598 INFO L226 Difference]: Without dead ends: 1920 [2021-08-12 19:23:38,598 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1118.4ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:23:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-12 19:23:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1776. [2021-08-12 19:23:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-08-12 19:23:39,265 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-08-12 19:23:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:39,265 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-08-12 19:23:39,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-08-12 19:23:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:39,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:39,267 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:39,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-08-12 19:23:39,468 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 122 times [2021-08-12 19:23:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:39,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202898632] [2021-08-12 19:23:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:39,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202898632] [2021-08-12 19:23:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202898632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332363535] [2021-08-12 19:23:39,637 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 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 [2021-08-12 19:23:39,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:40,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332363535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:40,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:40,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:40,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662639645] [2021-08-12 19:23:40,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:40,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:40,102 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:42,798 INFO L93 Difference]: Finished difference Result 2002 states and 4979 transitions. [2021-08-12 19:23:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:23:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:42,803 INFO L225 Difference]: With dead ends: 2002 [2021-08-12 19:23:42,803 INFO L226 Difference]: Without dead ends: 1928 [2021-08-12 19:23:42,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1047.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:23:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-12 19:23:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1792. [2021-08-12 19:23:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.490787269681742) internal successors, (4461), 1791 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4461 transitions. [2021-08-12 19:23:43,467 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4461 transitions. Word has length 32 [2021-08-12 19:23:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:43,467 INFO L482 AbstractCegarLoop]: Abstraction has 1792 states and 4461 transitions. [2021-08-12 19:23:43,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4461 transitions. [2021-08-12 19:23:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:43,470 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:43,470 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:43,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:43,685 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269506, now seen corresponding path program 123 times [2021-08-12 19:23:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466407873] [2021-08-12 19:23:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:43,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:43,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466407873] [2021-08-12 19:23:43,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466407873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:43,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471381206] [2021-08-12 19:23:43,988 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 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 [2021-08-12 19:23:44,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:23:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471381206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044081329] [2021-08-12 19:23:44,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:44,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:44,391 INFO L87 Difference]: Start difference. First operand 1792 states and 4461 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:47,095 INFO L93 Difference]: Finished difference Result 2002 states and 4975 transitions. [2021-08-12 19:23:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:23:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:47,100 INFO L225 Difference]: With dead ends: 2002 [2021-08-12 19:23:47,100 INFO L226 Difference]: Without dead ends: 1936 [2021-08-12 19:23:47,100 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:23:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-12 19:23:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1800. [2021-08-12 19:23:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.49082823790995) internal successors, (4481), 1799 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 4481 transitions. [2021-08-12 19:23:47,768 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 4481 transitions. Word has length 32 [2021-08-12 19:23:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:47,769 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 4481 transitions. [2021-08-12 19:23:47,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 4481 transitions. [2021-08-12 19:23:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:47,770 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:47,770 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:47,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:47,971 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 124 times [2021-08-12 19:23:47,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:47,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591903928] [2021-08-12 19:23:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591903928] [2021-08-12 19:23:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591903928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918265869] [2021-08-12 19:23:48,193 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 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 [2021-08-12 19:23:48,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:48,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:48,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918265869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:48,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:48,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459628410] [2021-08-12 19:23:48,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:48,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:48,637 INFO L87 Difference]: Start difference. First operand 1800 states and 4481 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:51,619 INFO L93 Difference]: Finished difference Result 2138 states and 5315 transitions. [2021-08-12 19:23:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:23:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:51,623 INFO L225 Difference]: With dead ends: 2138 [2021-08-12 19:23:51,623 INFO L226 Difference]: Without dead ends: 2072 [2021-08-12 19:23:51,624 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:23:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-08-12 19:23:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1816. [2021-08-12 19:23:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.4909090909090907) internal successors, (4521), 1815 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 4521 transitions. [2021-08-12 19:23:52,309 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 4521 transitions. Word has length 32 [2021-08-12 19:23:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:52,309 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 4521 transitions. [2021-08-12 19:23:52,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 4521 transitions. [2021-08-12 19:23:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:52,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:52,310 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:52,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-08-12 19:23:52,511 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:52,511 INFO L82 PathProgramCache]: Analyzing trace with hash -59085894, now seen corresponding path program 125 times [2021-08-12 19:23:52,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:52,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509025553] [2021-08-12 19:23:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:52,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:52,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509025553] [2021-08-12 19:23:52,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509025553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:52,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851157327] [2021-08-12 19:23:52,728 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 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 [2021-08-12 19:23:52,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:23:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851157327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:53,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:53,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491529636] [2021-08-12 19:23:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:53,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:53,208 INFO L87 Difference]: Start difference. First operand 1816 states and 4521 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:56,111 INFO L93 Difference]: Finished difference Result 2106 states and 5239 transitions. [2021-08-12 19:23:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:23:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:23:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:56,116 INFO L225 Difference]: With dead ends: 2106 [2021-08-12 19:23:56,116 INFO L226 Difference]: Without dead ends: 2040 [2021-08-12 19:23:56,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1075.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:23:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-08-12 19:23:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1840. [2021-08-12 19:23:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 2.4910277324632952) internal successors, (4581), 1839 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 4581 transitions. [2021-08-12 19:23:56,828 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 4581 transitions. Word has length 32 [2021-08-12 19:23:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:56,828 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 4581 transitions. [2021-08-12 19:23:56,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 4581 transitions. [2021-08-12 19:23:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:23:56,830 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:56,830 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:57,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1716,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:57,030 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 126 times [2021-08-12 19:23:57,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:57,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940755123] [2021-08-12 19:23:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:57,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:57,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940755123] [2021-08-12 19:23:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940755123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:57,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055331844] [2021-08-12 19:23:57,248 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 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 [2021-08-12 19:23:57,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:23:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:23:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:57,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055331844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:57,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:57,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:23:57,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449911735] [2021-08-12 19:23:57,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:23:57,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:23:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:57,767 INFO L87 Difference]: Start difference. First operand 1840 states and 4581 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:00,890 INFO L93 Difference]: Finished difference Result 2186 states and 5443 transitions. [2021-08-12 19:24:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:24:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:00,895 INFO L225 Difference]: With dead ends: 2186 [2021-08-12 19:24:00,895 INFO L226 Difference]: Without dead ends: 2104 [2021-08-12 19:24:00,895 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1142.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:24:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-08-12 19:24:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1864. [2021-08-12 19:24:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.4911433172302737) internal successors, (4641), 1863 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4641 transitions. [2021-08-12 19:24:01,623 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4641 transitions. Word has length 32 [2021-08-12 19:24:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:01,623 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 4641 transitions. [2021-08-12 19:24:01,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4641 transitions. [2021-08-12 19:24:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:01,624 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:01,624 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:01,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1742,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:01,825 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash 690028670, now seen corresponding path program 127 times [2021-08-12 19:24:01,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:01,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003361763] [2021-08-12 19:24:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:02,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003361763] [2021-08-12 19:24:02,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003361763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825620974] [2021-08-12 19:24:02,031 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 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 [2021-08-12 19:24:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:02,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825620974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:02,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:02,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:02,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321869496] [2021-08-12 19:24:02,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:02,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:02,395 INFO L87 Difference]: Start difference. First operand 1864 states and 4641 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:04,964 INFO L93 Difference]: Finished difference Result 2058 states and 5119 transitions. [2021-08-12 19:24:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:24:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:04,969 INFO L225 Difference]: With dead ends: 2058 [2021-08-12 19:24:04,969 INFO L226 Difference]: Without dead ends: 1984 [2021-08-12 19:24:04,969 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 630.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:24:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-08-12 19:24:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1880. [2021-08-12 19:24:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.491218733368813) internal successors, (4681), 1879 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4681 transitions. [2021-08-12 19:24:05,707 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4681 transitions. Word has length 32 [2021-08-12 19:24:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:05,707 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 4681 transitions. [2021-08-12 19:24:05,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4681 transitions. [2021-08-12 19:24:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:05,709 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:05,709 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:05,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1764 [2021-08-12 19:24:05,909 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 128 times [2021-08-12 19:24:05,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:05,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41142586] [2021-08-12 19:24:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:06,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:06,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41142586] [2021-08-12 19:24:06,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41142586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:06,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585985359] [2021-08-12 19:24:06,121 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 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 [2021-08-12 19:24:06,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:06,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585985359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:06,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:06,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:06,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495597471] [2021-08-12 19:24:06,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:06,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:06,598 INFO L87 Difference]: Start difference. First operand 1880 states and 4681 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:09,427 INFO L93 Difference]: Finished difference Result 2162 states and 5387 transitions. [2021-08-12 19:24:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:24:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:09,433 INFO L225 Difference]: With dead ends: 2162 [2021-08-12 19:24:09,433 INFO L226 Difference]: Without dead ends: 2080 [2021-08-12 19:24:09,433 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:24:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-08-12 19:24:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1920. [2021-08-12 19:24:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.4914017717561228) internal successors, (4781), 1919 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4781 transitions. [2021-08-12 19:24:10,196 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4781 transitions. Word has length 32 [2021-08-12 19:24:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:10,196 INFO L482 AbstractCegarLoop]: Abstraction has 1920 states and 4781 transitions. [2021-08-12 19:24:10,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4781 transitions. [2021-08-12 19:24:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:10,197 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:10,197 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:10,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:10,398 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -587357826, now seen corresponding path program 129 times [2021-08-12 19:24:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:10,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793364247] [2021-08-12 19:24:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:10,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793364247] [2021-08-12 19:24:10,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793364247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96533268] [2021-08-12 19:24:10,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:24:10,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:24:10,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:24:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:10,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96533268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:10,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:10,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162308708] [2021-08-12 19:24:10,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:10,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:10,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:10,938 INFO L87 Difference]: Start difference. First operand 1920 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:13,844 INFO L93 Difference]: Finished difference Result 2114 states and 5259 transitions. [2021-08-12 19:24:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:24:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:13,849 INFO L225 Difference]: With dead ends: 2114 [2021-08-12 19:24:13,849 INFO L226 Difference]: Without dead ends: 2040 [2021-08-12 19:24:13,849 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:24:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-08-12 19:24:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1912. [2021-08-12 19:24:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-08-12 19:24:14,617 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-08-12 19:24:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:14,617 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-08-12 19:24:14,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-08-12 19:24:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:14,619 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:14,619 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:14,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-08-12 19:24:14,819 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1197117250, now seen corresponding path program 130 times [2021-08-12 19:24:14,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:14,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493872828] [2021-08-12 19:24:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:15,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493872828] [2021-08-12 19:24:15,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493872828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835564897] [2021-08-12 19:24:15,085 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 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 [2021-08-12 19:24:15,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:15,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835564897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:15,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:15,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875452446] [2021-08-12 19:24:15,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:15,481 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:18,472 INFO L93 Difference]: Finished difference Result 2106 states and 5239 transitions. [2021-08-12 19:24:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:24:18,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:18,477 INFO L225 Difference]: With dead ends: 2106 [2021-08-12 19:24:18,477 INFO L226 Difference]: Without dead ends: 2032 [2021-08-12 19:24:18,477 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 957.2ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:24:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-08-12 19:24:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1912. [2021-08-12 19:24:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-08-12 19:24:19,242 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-08-12 19:24:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:19,242 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-08-12 19:24:19,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-08-12 19:24:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:19,244 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:19,244 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:19,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:19,445 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 991178818, now seen corresponding path program 131 times [2021-08-12 19:24:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739703381] [2021-08-12 19:24:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:19,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:19,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739703381] [2021-08-12 19:24:19,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739703381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:19,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778557936] [2021-08-12 19:24:19,693 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 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 [2021-08-12 19:24:19,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:24:19,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778557936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884822441] [2021-08-12 19:24:20,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:20,088 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:23,193 INFO L93 Difference]: Finished difference Result 2178 states and 5415 transitions. [2021-08-12 19:24:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:24:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:23,198 INFO L225 Difference]: With dead ends: 2178 [2021-08-12 19:24:23,198 INFO L226 Difference]: Without dead ends: 2112 [2021-08-12 19:24:23,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 954.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:24:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-12 19:24:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1928. [2021-08-12 19:24:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.4914374675661652) internal successors, (4801), 1927 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 4801 transitions. [2021-08-12 19:24:23,991 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 4801 transitions. Word has length 32 [2021-08-12 19:24:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:23,991 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 4801 transitions. [2021-08-12 19:24:23,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 4801 transitions. [2021-08-12 19:24:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:23,993 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:23,993 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:24,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:24,193 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 132 times [2021-08-12 19:24:24,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:24,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124611138] [2021-08-12 19:24:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:24,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124611138] [2021-08-12 19:24:24,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124611138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143899583] [2021-08-12 19:24:24,391 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 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 [2021-08-12 19:24:24,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:24:24,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:24,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143899583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:24,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:24,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593539310] [2021-08-12 19:24:24,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:24,775 INFO L87 Difference]: Start difference. First operand 1928 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:27,877 INFO L93 Difference]: Finished difference Result 2178 states and 5415 transitions. [2021-08-12 19:24:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:24:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:27,881 INFO L225 Difference]: With dead ends: 2178 [2021-08-12 19:24:27,881 INFO L226 Difference]: Without dead ends: 2112 [2021-08-12 19:24:27,882 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:24:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-12 19:24:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1944. [2021-08-12 19:24:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.4915079773546065) internal successors, (4841), 1943 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 4841 transitions. [2021-08-12 19:24:28,692 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 4841 transitions. Word has length 32 [2021-08-12 19:24:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:28,692 INFO L482 AbstractCegarLoop]: Abstraction has 1944 states and 4841 transitions. [2021-08-12 19:24:28,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 4841 transitions. [2021-08-12 19:24:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:28,694 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:28,694 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:28,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1842,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:28,894 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:28,895 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 133 times [2021-08-12 19:24:28,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:28,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822060172] [2021-08-12 19:24:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:29,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:29,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822060172] [2021-08-12 19:24:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822060172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514305639] [2021-08-12 19:24:29,082 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 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 [2021-08-12 19:24:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:24:29,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:29,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514305639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:29,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:29,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:29,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642506505] [2021-08-12 19:24:29,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:29,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:29,472 INFO L87 Difference]: Start difference. First operand 1944 states and 4841 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:32,659 INFO L93 Difference]: Finished difference Result 2274 states and 5659 transitions. [2021-08-12 19:24:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:24:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:32,664 INFO L225 Difference]: With dead ends: 2274 [2021-08-12 19:24:32,664 INFO L226 Difference]: Without dead ends: 2200 [2021-08-12 19:24:32,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 804.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:24:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-08-12 19:24:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1976. [2021-08-12 19:24:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.4916455696202533) internal successors, (4921), 1975 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4921 transitions. [2021-08-12 19:24:33,505 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4921 transitions. Word has length 32 [2021-08-12 19:24:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:33,506 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4921 transitions. [2021-08-12 19:24:33,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4921 transitions. [2021-08-12 19:24:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:33,507 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:33,507 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:33,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1860 [2021-08-12 19:24:33,708 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 134 times [2021-08-12 19:24:33,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:33,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950666685] [2021-08-12 19:24:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:33,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950666685] [2021-08-12 19:24:33,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950666685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870721358] [2021-08-12 19:24:33,928 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 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 [2021-08-12 19:24:33,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:33,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:33,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:34,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870721358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:34,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:34,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044412039] [2021-08-12 19:24:34,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:34,292 INFO L87 Difference]: Start difference. First operand 1976 states and 4921 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:37,964 INFO L93 Difference]: Finished difference Result 2314 states and 5755 transitions. [2021-08-12 19:24:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:24:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:37,969 INFO L225 Difference]: With dead ends: 2314 [2021-08-12 19:24:37,969 INFO L226 Difference]: Without dead ends: 2248 [2021-08-12 19:24:37,969 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1084.1ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:24:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-12 19:24:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1992. [2021-08-12 19:24:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 2.4917127071823204) internal successors, (4961), 1991 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 4961 transitions. [2021-08-12 19:24:38,839 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 4961 transitions. Word has length 32 [2021-08-12 19:24:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:38,839 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 4961 transitions. [2021-08-12 19:24:38,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 4961 transitions. [2021-08-12 19:24:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:38,840 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:38,840 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:39,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1870 [2021-08-12 19:24:39,041 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 135 times [2021-08-12 19:24:39,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:39,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622829029] [2021-08-12 19:24:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:39,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622829029] [2021-08-12 19:24:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622829029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661193389] [2021-08-12 19:24:39,302 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 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 [2021-08-12 19:24:39,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:24:39,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:39,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:39,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661193389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:39,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:39,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:39,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466290267] [2021-08-12 19:24:39,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:39,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:39,682 INFO L87 Difference]: Start difference. First operand 1992 states and 4961 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:42,983 INFO L93 Difference]: Finished difference Result 2210 states and 5499 transitions. [2021-08-12 19:24:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:24:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:42,988 INFO L225 Difference]: With dead ends: 2210 [2021-08-12 19:24:42,988 INFO L226 Difference]: Without dead ends: 2136 [2021-08-12 19:24:42,988 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:24:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-12 19:24:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2008. [2021-08-12 19:24:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.491778774289985) internal successors, (5001), 2007 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5001 transitions. [2021-08-12 19:24:43,875 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5001 transitions. Word has length 32 [2021-08-12 19:24:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:43,875 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 5001 transitions. [2021-08-12 19:24:43,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5001 transitions. [2021-08-12 19:24:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:43,877 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:43,877 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:44,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1885,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:44,081 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1759088314, now seen corresponding path program 136 times [2021-08-12 19:24:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:44,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663897140] [2021-08-12 19:24:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:44,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:44,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663897140] [2021-08-12 19:24:44,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663897140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:44,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601447038] [2021-08-12 19:24:44,300 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 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 [2021-08-12 19:24:44,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:44,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601447038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:44,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:44,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:44,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705101503] [2021-08-12 19:24:44,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:44,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:44,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:44,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:44,750 INFO L87 Difference]: Start difference. First operand 2008 states and 5001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:48,147 INFO L93 Difference]: Finished difference Result 2266 states and 5639 transitions. [2021-08-12 19:24:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:24:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:48,152 INFO L225 Difference]: With dead ends: 2266 [2021-08-12 19:24:48,152 INFO L226 Difference]: Without dead ends: 2192 [2021-08-12 19:24:48,152 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 949.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:24:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-12 19:24:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2024. [2021-08-12 19:24:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-08-12 19:24:49,075 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-08-12 19:24:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:49,075 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-08-12 19:24:49,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-08-12 19:24:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:49,076 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:49,076 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:49,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1901 [2021-08-12 19:24:49,277 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 137 times [2021-08-12 19:24:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609004993] [2021-08-12 19:24:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:49,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:49,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609004993] [2021-08-12 19:24:49,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609004993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:49,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848859069] [2021-08-12 19:24:49,559 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 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 [2021-08-12 19:24:49,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:24:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848859069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:50,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:50,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:50,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805506629] [2021-08-12 19:24:50,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:50,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:50,061 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:53,555 INFO L93 Difference]: Finished difference Result 2274 states and 5659 transitions. [2021-08-12 19:24:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:24:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:53,559 INFO L225 Difference]: With dead ends: 2274 [2021-08-12 19:24:53,559 INFO L226 Difference]: Without dead ends: 2200 [2021-08-12 19:24:53,560 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:24:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-08-12 19:24:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2032. [2021-08-12 19:24:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.4918759231905465) internal successors, (5061), 2031 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5061 transitions. [2021-08-12 19:24:54,478 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5061 transitions. Word has length 32 [2021-08-12 19:24:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:54,478 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5061 transitions. [2021-08-12 19:24:54,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5061 transitions. [2021-08-12 19:24:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:24:54,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:54,480 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:54,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1915,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:54,680 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 138 times [2021-08-12 19:24:54,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:54,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399759409] [2021-08-12 19:24:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:54,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399759409] [2021-08-12 19:24:54,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399759409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057434196] [2021-08-12 19:24:54,980 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 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 [2021-08-12 19:24:55,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:24:55,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:24:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057434196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:55,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:55,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:24:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829077673] [2021-08-12 19:24:55,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:55,513 INFO L87 Difference]: Start difference. First operand 2032 states and 5061 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:59,324 INFO L93 Difference]: Finished difference Result 2322 states and 5771 transitions. [2021-08-12 19:24:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:24:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:24:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:59,329 INFO L225 Difference]: With dead ends: 2322 [2021-08-12 19:24:59,329 INFO L226 Difference]: Without dead ends: 2264 [2021-08-12 19:24:59,329 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1312.6ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:24:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-12 19:25:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2024. [2021-08-12 19:25:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-08-12 19:25:00,247 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-08-12 19:25:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:00,247 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-08-12 19:25:00,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-08-12 19:25:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:00,249 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:00,249 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:00,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1932 [2021-08-12 19:25:00,449 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 139 times [2021-08-12 19:25:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:00,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500991300] [2021-08-12 19:25:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:00,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:00,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500991300] [2021-08-12 19:25:00,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500991300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:00,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193417749] [2021-08-12 19:25:00,661 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 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 [2021-08-12 19:25:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193417749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:01,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:01,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351057844] [2021-08-12 19:25:01,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:01,093 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:04,392 INFO L93 Difference]: Finished difference Result 2210 states and 5499 transitions. [2021-08-12 19:25:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:25:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:04,397 INFO L225 Difference]: With dead ends: 2210 [2021-08-12 19:25:04,397 INFO L226 Difference]: Without dead ends: 2136 [2021-08-12 19:25:04,397 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:25:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-12 19:25:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2024. [2021-08-12 19:25:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-08-12 19:25:05,318 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-08-12 19:25:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:05,318 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-08-12 19:25:05,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-08-12 19:25:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:05,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:05,320 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:05,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1953,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:05,520 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:05,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:05,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 140 times [2021-08-12 19:25:05,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:05,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86808215] [2021-08-12 19:25:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:05,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86808215] [2021-08-12 19:25:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86808215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443788370] [2021-08-12 19:25:05,723 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 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 [2021-08-12 19:25:05,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:25:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:06,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443788370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:06,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:06,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:06,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109292400] [2021-08-12 19:25:06,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:06,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:06,243 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:09,876 INFO L93 Difference]: Finished difference Result 2322 states and 5783 transitions. [2021-08-12 19:25:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:25:09,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:09,881 INFO L225 Difference]: With dead ends: 2322 [2021-08-12 19:25:09,881 INFO L226 Difference]: Without dead ends: 2248 [2021-08-12 19:25:09,881 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1177.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:25:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-12 19:25:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2024. [2021-08-12 19:25:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-08-12 19:25:10,815 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-08-12 19:25:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:10,815 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-08-12 19:25:10,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-08-12 19:25:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:10,816 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:10,816 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:11,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-08-12 19:25:11,017 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash 85430458, now seen corresponding path program 141 times [2021-08-12 19:25:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:11,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797586938] [2021-08-12 19:25:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:11,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797586938] [2021-08-12 19:25:11,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797586938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:11,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37763820] [2021-08-12 19:25:11,176 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 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 [2021-08-12 19:25:11,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:25:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:11,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:11,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37763820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:11,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:11,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:11,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834987658] [2021-08-12 19:25:11,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:11,671 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:15,280 INFO L93 Difference]: Finished difference Result 2242 states and 5575 transitions. [2021-08-12 19:25:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:25:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:15,285 INFO L225 Difference]: With dead ends: 2242 [2021-08-12 19:25:15,285 INFO L226 Difference]: Without dead ends: 2176 [2021-08-12 19:25:15,286 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1097.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:25:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-08-12 19:25:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2048. [2021-08-12 19:25:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.4919394235466537) internal successors, (5101), 2047 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5101 transitions. [2021-08-12 19:25:16,260 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5101 transitions. Word has length 32 [2021-08-12 19:25:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:16,260 INFO L482 AbstractCegarLoop]: Abstraction has 2048 states and 5101 transitions. [2021-08-12 19:25:16,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5101 transitions. [2021-08-12 19:25:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:16,262 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:16,262 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1990 [2021-08-12 19:25:16,462 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 142 times [2021-08-12 19:25:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:16,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224605469] [2021-08-12 19:25:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:16,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224605469] [2021-08-12 19:25:16,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224605469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421566749] [2021-08-12 19:25:16,682 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 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 [2021-08-12 19:25:16,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:25:16,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:16,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:17,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421566749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:17,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:17,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:17,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586235517] [2021-08-12 19:25:17,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:17,120 INFO L87 Difference]: Start difference. First operand 2048 states and 5101 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:20,849 INFO L93 Difference]: Finished difference Result 2314 states and 5759 transitions. [2021-08-12 19:25:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:25:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:20,854 INFO L225 Difference]: With dead ends: 2314 [2021-08-12 19:25:20,854 INFO L226 Difference]: Without dead ends: 2248 [2021-08-12 19:25:20,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1078.6ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:25:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-12 19:25:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2056. [2021-08-12 19:25:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.491970802919708) internal successors, (5121), 2055 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5121 transitions. [2021-08-12 19:25:21,833 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5121 transitions. Word has length 32 [2021-08-12 19:25:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:21,833 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5121 transitions. [2021-08-12 19:25:21,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5121 transitions. [2021-08-12 19:25:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:21,835 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:21,835 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:22,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2007 [2021-08-12 19:25:22,036 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 143 times [2021-08-12 19:25:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:22,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900460783] [2021-08-12 19:25:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:22,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:22,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900460783] [2021-08-12 19:25:22,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900460783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:22,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594285106] [2021-08-12 19:25:22,303 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 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 [2021-08-12 19:25:22,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:25:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594285106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:22,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:22,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:22,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710921793] [2021-08-12 19:25:22,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:22,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:22,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:22,810 INFO L87 Difference]: Start difference. First operand 2056 states and 5121 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:26,422 INFO L93 Difference]: Finished difference Result 2274 states and 5655 transitions. [2021-08-12 19:25:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:25:26,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:26,427 INFO L225 Difference]: With dead ends: 2274 [2021-08-12 19:25:26,427 INFO L226 Difference]: Without dead ends: 2208 [2021-08-12 19:25:26,427 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:25:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-08-12 19:25:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2080. [2021-08-12 19:25:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.492063492063492) internal successors, (5181), 2079 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5181 transitions. [2021-08-12 19:25:27,414 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5181 transitions. Word has length 32 [2021-08-12 19:25:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:27,414 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5181 transitions. [2021-08-12 19:25:27,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5181 transitions. [2021-08-12 19:25:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:27,416 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:27,416 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-08-12 19:25:27,616 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 144 times [2021-08-12 19:25:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816742160] [2021-08-12 19:25:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:27,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:27,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816742160] [2021-08-12 19:25:27,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816742160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:27,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696188632] [2021-08-12 19:25:27,792 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 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 [2021-08-12 19:25:27,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:25:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:25:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696188632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:28,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:28,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:28,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447621003] [2021-08-12 19:25:28,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:28,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:28,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:28,100 INFO L87 Difference]: Start difference. First operand 2080 states and 5181 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:31,365 INFO L93 Difference]: Finished difference Result 2234 states and 5547 transitions. [2021-08-12 19:25:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:25:31,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:31,370 INFO L225 Difference]: With dead ends: 2234 [2021-08-12 19:25:31,370 INFO L226 Difference]: Without dead ends: 2176 [2021-08-12 19:25:31,370 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:25:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-08-12 19:25:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2064. [2021-08-12 19:25:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.49006301502666) internal successors, (5137), 2063 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5137 transitions. [2021-08-12 19:25:32,364 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5137 transitions. Word has length 32 [2021-08-12 19:25:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:32,364 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5137 transitions. [2021-08-12 19:25:32,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5137 transitions. [2021-08-12 19:25:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:32,366 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:32,366 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:32,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2037 [2021-08-12 19:25:32,566 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 619422726, now seen corresponding path program 145 times [2021-08-12 19:25:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:32,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931866333] [2021-08-12 19:25:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:32,730 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2021-08-12 19:25:32,854 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2021-08-12 19:25:33,012 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 7 [2021-08-12 19:25:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:33,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:33,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931866333] [2021-08-12 19:25:33,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931866333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:33,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611582180] [2021-08-12 19:25:33,083 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 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 [2021-08-12 19:25:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:25:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611582180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:33,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:33,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232587368] [2021-08-12 19:25:33,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:33,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:33,365 INFO L87 Difference]: Start difference. First operand 2064 states and 5137 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:36,771 INFO L93 Difference]: Finished difference Result 2266 states and 5627 transitions. [2021-08-12 19:25:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:25:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:36,776 INFO L225 Difference]: With dead ends: 2266 [2021-08-12 19:25:36,776 INFO L226 Difference]: Without dead ends: 2208 [2021-08-12 19:25:36,776 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:25:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-08-12 19:25:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2072. [2021-08-12 19:25:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-08-12 19:25:37,791 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-08-12 19:25:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:37,792 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-08-12 19:25:37,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-08-12 19:25:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:37,793 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:37,793 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:37,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2053,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:37,994 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1540223554, now seen corresponding path program 146 times [2021-08-12 19:25:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:37,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492494901] [2021-08-12 19:25:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:38,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:38,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492494901] [2021-08-12 19:25:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492494901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:38,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332689992] [2021-08-12 19:25:38,357 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 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 [2021-08-12 19:25:38,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:25:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:38,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332689992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:38,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:38,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:38,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598529326] [2021-08-12 19:25:38,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:38,797 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:42,420 INFO L93 Difference]: Finished difference Result 2282 states and 5671 transitions. [2021-08-12 19:25:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:25:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:25:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:42,425 INFO L225 Difference]: With dead ends: 2282 [2021-08-12 19:25:42,425 INFO L226 Difference]: Without dead ends: 2216 [2021-08-12 19:25:42,425 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 893.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:25:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-12 19:25:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2072. [2021-08-12 19:25:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-08-12 19:25:43,446 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-08-12 19:25:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:43,446 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-08-12 19:25:43,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-08-12 19:25:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:25:43,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:43,448 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:43,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2065,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:43,649 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1737475334, now seen corresponding path program 147 times [2021-08-12 19:25:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:43,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678491580] [2021-08-12 19:25:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:45,324 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 56 DAG size of output: 7 [2021-08-12 19:25:49,720 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2021-08-12 19:25:55,639 WARN L205 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2021-08-12 19:25:55,977 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-08-12 19:25:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:56,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678491580] [2021-08-12 19:25:56,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678491580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500473866] [2021-08-12 19:25:56,037 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 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 [2021-08-12 19:25:56,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:25:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:25:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:56,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500473866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:56,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:56,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:25:56,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172379832] [2021-08-12 19:25:56,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:56,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:56,391 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:00,349 INFO L93 Difference]: Finished difference Result 2330 states and 5791 transitions. [2021-08-12 19:26:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:26:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:00,355 INFO L225 Difference]: With dead ends: 2330 [2021-08-12 19:26:00,355 INFO L226 Difference]: Without dead ends: 2264 [2021-08-12 19:26:00,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:26:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-12 19:26:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2096. [2021-08-12 19:26:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-08-12 19:26:01,410 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-08-12 19:26:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:01,411 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-08-12 19:26:01,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-08-12 19:26:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:01,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:01,412 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:01,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:01,613 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 148 times [2021-08-12 19:26:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:01,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724020663] [2021-08-12 19:26:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:01,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724020663] [2021-08-12 19:26:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724020663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798327409] [2021-08-12 19:26:01,816 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 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 [2021-08-12 19:26:01,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:02,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798327409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:02,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:02,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:02,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841635124] [2021-08-12 19:26:02,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:02,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:02,259 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:06,295 INFO L93 Difference]: Finished difference Result 2442 states and 6079 transitions. [2021-08-12 19:26:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:26:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:06,301 INFO L225 Difference]: With dead ends: 2442 [2021-08-12 19:26:06,301 INFO L226 Difference]: Without dead ends: 2368 [2021-08-12 19:26:06,301 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 913.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:26:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-08-12 19:26:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2080. [2021-08-12 19:26:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-08-12 19:26:07,375 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-08-12 19:26:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:07,375 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-08-12 19:26:07,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-08-12 19:26:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:07,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:07,377 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:07,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2103 [2021-08-12 19:26:07,577 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 149 times [2021-08-12 19:26:07,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:07,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983768502] [2021-08-12 19:26:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:07,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:07,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983768502] [2021-08-12 19:26:07,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983768502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:07,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233452180] [2021-08-12 19:26:07,785 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 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 [2021-08-12 19:26:07,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:26:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:08,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233452180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:08,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:08,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:08,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82340131] [2021-08-12 19:26:08,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:08,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:08,272 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:12,607 INFO L93 Difference]: Finished difference Result 2450 states and 6095 transitions. [2021-08-12 19:26:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:26:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:12,612 INFO L225 Difference]: With dead ends: 2450 [2021-08-12 19:26:12,612 INFO L226 Difference]: Without dead ends: 2384 [2021-08-12 19:26:12,612 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1118.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:26:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-12 19:26:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2080. [2021-08-12 19:26:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-08-12 19:26:13,687 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-08-12 19:26:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:13,688 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-08-12 19:26:13,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-08-12 19:26:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:13,689 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:13,689 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:13,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2127 [2021-08-12 19:26:13,890 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 150 times [2021-08-12 19:26:13,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:13,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853983675] [2021-08-12 19:26:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853983675] [2021-08-12 19:26:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853983675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017939976] [2021-08-12 19:26:14,091 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 [2021-08-12 19:26:14,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:26:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:14,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017939976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:14,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:14,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:14,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107841329] [2021-08-12 19:26:14,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:14,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:14,444 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:18,171 INFO L93 Difference]: Finished difference Result 2250 states and 5595 transitions. [2021-08-12 19:26:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:26:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:18,176 INFO L225 Difference]: With dead ends: 2250 [2021-08-12 19:26:18,176 INFO L226 Difference]: Without dead ends: 2176 [2021-08-12 19:26:18,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:26:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-08-12 19:26:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2096. [2021-08-12 19:26:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-08-12 19:26:19,272 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-08-12 19:26:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:19,272 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-08-12 19:26:19,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-08-12 19:26:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:19,273 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:19,273 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:19,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2151 [2021-08-12 19:26:19,474 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 151 times [2021-08-12 19:26:19,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:19,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330927449] [2021-08-12 19:26:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:19,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330927449] [2021-08-12 19:26:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330927449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134641093] [2021-08-12 19:26:19,618 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 [2021-08-12 19:26:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134641093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:20,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:20,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140989827] [2021-08-12 19:26:20,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:20,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:20,073 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:24,042 INFO L93 Difference]: Finished difference Result 2402 states and 5979 transitions. [2021-08-12 19:26:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:26:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:24,047 INFO L225 Difference]: With dead ends: 2402 [2021-08-12 19:26:24,048 INFO L226 Difference]: Without dead ends: 2320 [2021-08-12 19:26:24,048 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:26:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-12 19:26:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2096. [2021-08-12 19:26:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-08-12 19:26:25,155 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-08-12 19:26:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:25,156 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-08-12 19:26:25,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-08-12 19:26:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:25,157 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:25,157 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:25,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-08-12 19:26:25,358 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 54255998, now seen corresponding path program 152 times [2021-08-12 19:26:25,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:25,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953514803] [2021-08-12 19:26:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:25,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953514803] [2021-08-12 19:26:25,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953514803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244860970] [2021-08-12 19:26:25,637 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 [2021-08-12 19:26:25,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244860970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:26,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:26,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:26,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070108762] [2021-08-12 19:26:26,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:26,175 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:30,215 INFO L93 Difference]: Finished difference Result 2314 states and 5751 transitions. [2021-08-12 19:26:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:26:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:30,220 INFO L225 Difference]: With dead ends: 2314 [2021-08-12 19:26:30,220 INFO L226 Difference]: Without dead ends: 2248 [2021-08-12 19:26:30,221 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1213.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:26:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-12 19:26:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2096. [2021-08-12 19:26:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-08-12 19:26:31,331 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-08-12 19:26:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:31,332 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-08-12 19:26:31,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-08-12 19:26:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:31,333 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:31,333 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:31,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:31,534 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:31,534 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 153 times [2021-08-12 19:26:31,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:31,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158029303] [2021-08-12 19:26:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:31,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158029303] [2021-08-12 19:26:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158029303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610541259] [2021-08-12 19:26:31,757 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 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 [2021-08-12 19:26:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:26:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:32,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610541259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:32,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:32,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767547489] [2021-08-12 19:26:32,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:32,285 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:36,856 INFO L93 Difference]: Finished difference Result 2450 states and 6091 transitions. [2021-08-12 19:26:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:26:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:36,861 INFO L225 Difference]: With dead ends: 2450 [2021-08-12 19:26:36,861 INFO L226 Difference]: Without dead ends: 2384 [2021-08-12 19:26:36,862 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1293.7ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:26:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-12 19:26:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2104. [2021-08-12 19:26:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.4902520209224916) internal successors, (5237), 2103 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 5237 transitions. [2021-08-12 19:26:37,998 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 5237 transitions. Word has length 32 [2021-08-12 19:26:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:37,998 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 5237 transitions. [2021-08-12 19:26:37,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 5237 transitions. [2021-08-12 19:26:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:38,000 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:38,000 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:38,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2204,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:38,201 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:38,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 154 times [2021-08-12 19:26:38,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:38,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519032396] [2021-08-12 19:26:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:38,474 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-08-12 19:26:38,765 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-08-12 19:26:39,064 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-08-12 19:26:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:39,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:39,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519032396] [2021-08-12 19:26:39,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519032396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:39,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068765219] [2021-08-12 19:26:39,170 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 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 [2021-08-12 19:26:39,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:39,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068765219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:39,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:39,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:39,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268761045] [2021-08-12 19:26:39,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:39,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:39,632 INFO L87 Difference]: Start difference. First operand 2104 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:43,953 INFO L93 Difference]: Finished difference Result 2426 states and 6031 transitions. [2021-08-12 19:26:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:26:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:43,958 INFO L225 Difference]: With dead ends: 2426 [2021-08-12 19:26:43,958 INFO L226 Difference]: Without dead ends: 2360 [2021-08-12 19:26:43,958 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:26:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-08-12 19:26:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2144. [2021-08-12 19:26:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 2.490433971068595) internal successors, (5337), 2143 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 5337 transitions. [2021-08-12 19:26:45,115 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 5337 transitions. Word has length 32 [2021-08-12 19:26:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:45,115 INFO L482 AbstractCegarLoop]: Abstraction has 2144 states and 5337 transitions. [2021-08-12 19:26:45,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 5337 transitions. [2021-08-12 19:26:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:45,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:45,117 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:45,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-08-12 19:26:45,318 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash -320577802, now seen corresponding path program 155 times [2021-08-12 19:26:45,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:45,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376504965] [2021-08-12 19:26:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:45,820 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-08-12 19:26:46,308 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2021-08-12 19:26:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:46,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:46,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376504965] [2021-08-12 19:26:46,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376504965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:46,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403462555] [2021-08-12 19:26:46,448 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 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 [2021-08-12 19:26:46,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:26:46,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:46,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:46,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:46,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403462555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:46,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:46,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:46,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851782677] [2021-08-12 19:26:46,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:46,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:46,935 INFO L87 Difference]: Start difference. First operand 2144 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:51,083 INFO L93 Difference]: Finished difference Result 2362 states and 5871 transitions. [2021-08-12 19:26:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:26:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:51,089 INFO L225 Difference]: With dead ends: 2362 [2021-08-12 19:26:51,089 INFO L226 Difference]: Without dead ends: 2296 [2021-08-12 19:26:51,089 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:26:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-08-12 19:26:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2160. [2021-08-12 19:26:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.490504863362668) internal successors, (5377), 2159 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5377 transitions. [2021-08-12 19:26:52,273 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5377 transitions. Word has length 32 [2021-08-12 19:26:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:52,273 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 5377 transitions. [2021-08-12 19:26:52,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5377 transitions. [2021-08-12 19:26:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:52,275 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:52,275 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:52,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-08-12 19:26:52,475 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 156 times [2021-08-12 19:26:52,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:52,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080268496] [2021-08-12 19:26:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:52,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080268496] [2021-08-12 19:26:52,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080268496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582307174] [2021-08-12 19:26:52,673 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 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 [2021-08-12 19:26:52,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:26:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582307174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:53,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:53,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:53,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070151018] [2021-08-12 19:26:53,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:53,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:53,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:53,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:53,184 INFO L87 Difference]: Start difference. First operand 2160 states and 5377 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:57,549 INFO L93 Difference]: Finished difference Result 2410 states and 5995 transitions. [2021-08-12 19:26:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:26:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:26:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:57,555 INFO L225 Difference]: With dead ends: 2410 [2021-08-12 19:26:57,555 INFO L226 Difference]: Without dead ends: 2336 [2021-08-12 19:26:57,555 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1159.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:26:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-08-12 19:26:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2168. [2021-08-12 19:26:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 2.490539916935856) internal successors, (5397), 2167 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 5397 transitions. [2021-08-12 19:26:58,752 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 5397 transitions. Word has length 32 [2021-08-12 19:26:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:58,752 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 5397 transitions. [2021-08-12 19:26:58,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 5397 transitions. [2021-08-12 19:26:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:26:58,754 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:58,754 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:58,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2262,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:58,955 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 157 times [2021-08-12 19:26:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:58,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149690985] [2021-08-12 19:26:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:59,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149690985] [2021-08-12 19:26:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149690985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536569480] [2021-08-12 19:26:59,144 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 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 [2021-08-12 19:26:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:26:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:59,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536569480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:59,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:59,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:26:59,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164077270] [2021-08-12 19:26:59,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:59,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:59,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:59,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:59,585 INFO L87 Difference]: Start difference. First operand 2168 states and 5397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:04,260 INFO L93 Difference]: Finished difference Result 2506 states and 6235 transitions. [2021-08-12 19:27:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:27:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:04,265 INFO L225 Difference]: With dead ends: 2506 [2021-08-12 19:27:04,266 INFO L226 Difference]: Without dead ends: 2432 [2021-08-12 19:27:04,266 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1110.5ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:27:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-08-12 19:27:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2176. [2021-08-12 19:27:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.4905747126436784) internal successors, (5417), 2175 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 5417 transitions. [2021-08-12 19:27:05,490 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 5417 transitions. Word has length 32 [2021-08-12 19:27:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:05,490 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 5417 transitions. [2021-08-12 19:27:05,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 5417 transitions. [2021-08-12 19:27:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:05,491 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:05,491 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:05,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:05,692 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:05,692 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 158 times [2021-08-12 19:27:05,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:05,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854403250] [2021-08-12 19:27:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:05,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854403250] [2021-08-12 19:27:05,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854403250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:05,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531850344] [2021-08-12 19:27:05,870 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 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 [2021-08-12 19:27:05,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:05,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531850344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:06,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:06,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:06,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512241481] [2021-08-12 19:27:06,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:06,344 INFO L87 Difference]: Start difference. First operand 2176 states and 5417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:10,857 INFO L93 Difference]: Finished difference Result 2466 states and 6131 transitions. [2021-08-12 19:27:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:27:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:10,863 INFO L225 Difference]: With dead ends: 2466 [2021-08-12 19:27:10,863 INFO L226 Difference]: Without dead ends: 2400 [2021-08-12 19:27:10,863 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:27:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-12 19:27:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2192. [2021-08-12 19:27:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-08-12 19:27:12,101 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-08-12 19:27:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:12,101 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-08-12 19:27:12,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-08-12 19:27:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:12,103 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:12,103 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:12,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-08-12 19:27:12,304 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 159 times [2021-08-12 19:27:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:12,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876277189] [2021-08-12 19:27:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:12,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:12,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876277189] [2021-08-12 19:27:12,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876277189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:12,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257205900] [2021-08-12 19:27:12,500 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 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 [2021-08-12 19:27:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:27:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257205900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:13,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:13,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:13,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785138003] [2021-08-12 19:27:13,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:13,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:13,076 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:17,761 INFO L93 Difference]: Finished difference Result 2522 states and 6275 transitions. [2021-08-12 19:27:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:27:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:17,767 INFO L225 Difference]: With dead ends: 2522 [2021-08-12 19:27:17,767 INFO L226 Difference]: Without dead ends: 2448 [2021-08-12 19:27:17,767 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1245.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:27:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-12 19:27:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2021-08-12 19:27:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 2.490744920993228) internal successors, (5517), 2215 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5517 transitions. [2021-08-12 19:27:19,027 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5517 transitions. Word has length 32 [2021-08-12 19:27:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:19,027 INFO L482 AbstractCegarLoop]: Abstraction has 2216 states and 5517 transitions. [2021-08-12 19:27:19,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5517 transitions. [2021-08-12 19:27:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:19,028 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:19,029 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:19,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2324,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:19,229 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 160 times [2021-08-12 19:27:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:19,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323031747] [2021-08-12 19:27:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:19,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:19,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323031747] [2021-08-12 19:27:19,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323031747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:19,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574917093] [2021-08-12 19:27:19,471 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 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 [2021-08-12 19:27:19,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574917093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:19,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:19,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:19,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203191145] [2021-08-12 19:27:19,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:19,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:19,999 INFO L87 Difference]: Start difference. First operand 2216 states and 5517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:24,540 INFO L93 Difference]: Finished difference Result 2418 states and 6007 transitions. [2021-08-12 19:27:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:27:24,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:24,546 INFO L225 Difference]: With dead ends: 2418 [2021-08-12 19:27:24,546 INFO L226 Difference]: Without dead ends: 2360 [2021-08-12 19:27:24,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1116.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:27:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-08-12 19:27:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2200. [2021-08-12 19:27:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-08-12 19:27:25,809 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-08-12 19:27:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:25,810 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-08-12 19:27:25,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-08-12 19:27:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:25,811 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:25,811 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:26,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-08-12 19:27:26,012 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 161 times [2021-08-12 19:27:26,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:26,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358059244] [2021-08-12 19:27:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:26,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358059244] [2021-08-12 19:27:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358059244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611112759] [2021-08-12 19:27:26,298 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 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 [2021-08-12 19:27:26,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:27:26,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:27:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:26,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611112759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:26,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:26,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159453802] [2021-08-12 19:27:26,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:26,605 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:30,756 INFO L93 Difference]: Finished difference Result 2330 states and 5791 transitions. [2021-08-12 19:27:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:27:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:30,761 INFO L225 Difference]: With dead ends: 2330 [2021-08-12 19:27:30,761 INFO L226 Difference]: Without dead ends: 2264 [2021-08-12 19:27:30,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:27:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-12 19:27:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2200. [2021-08-12 19:27:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-08-12 19:27:32,030 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-08-12 19:27:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:32,030 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-08-12 19:27:32,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-08-12 19:27:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:32,032 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:32,032 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:32,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2368 [2021-08-12 19:27:32,233 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -836348222, now seen corresponding path program 162 times [2021-08-12 19:27:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:32,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381922387] [2021-08-12 19:27:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:32,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381922387] [2021-08-12 19:27:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381922387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581612558] [2021-08-12 19:27:32,364 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 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 [2021-08-12 19:27:32,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:27:32,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581612558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:32,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:32,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413951720] [2021-08-12 19:27:32,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:32,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:32,785 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:37,244 INFO L93 Difference]: Finished difference Result 2402 states and 5971 transitions. [2021-08-12 19:27:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:27:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:37,250 INFO L225 Difference]: With dead ends: 2402 [2021-08-12 19:27:37,250 INFO L226 Difference]: Without dead ends: 2336 [2021-08-12 19:27:37,250 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 995.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:27:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-08-12 19:27:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2200. [2021-08-12 19:27:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-08-12 19:27:38,528 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-08-12 19:27:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:38,528 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-08-12 19:27:38,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-08-12 19:27:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:38,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:38,530 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:38,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2378 [2021-08-12 19:27:38,730 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 163 times [2021-08-12 19:27:38,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:38,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476784837] [2021-08-12 19:27:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:38,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476784837] [2021-08-12 19:27:38,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476784837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:38,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805779240] [2021-08-12 19:27:38,938 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 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 [2021-08-12 19:27:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:38,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:39,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805779240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:39,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:39,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:39,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037711740] [2021-08-12 19:27:39,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:39,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:39,428 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:44,106 INFO L93 Difference]: Finished difference Result 2546 states and 6335 transitions. [2021-08-12 19:27:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:27:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:44,111 INFO L225 Difference]: With dead ends: 2546 [2021-08-12 19:27:44,111 INFO L226 Difference]: Without dead ends: 2472 [2021-08-12 19:27:44,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:27:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-12 19:27:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2192. [2021-08-12 19:27:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-08-12 19:27:45,399 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-08-12 19:27:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:45,399 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-08-12 19:27:45,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-08-12 19:27:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:45,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:45,401 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:45,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:45,601 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1854182074, now seen corresponding path program 164 times [2021-08-12 19:27:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:45,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627953206] [2021-08-12 19:27:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:45,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627953206] [2021-08-12 19:27:45,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627953206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787738458] [2021-08-12 19:27:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:27:45,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787738458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:46,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:46,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812479884] [2021-08-12 19:27:46,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:46,336 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:51,052 INFO L93 Difference]: Finished difference Result 2482 states and 6175 transitions. [2021-08-12 19:27:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:27:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:51,057 INFO L225 Difference]: With dead ends: 2482 [2021-08-12 19:27:51,057 INFO L226 Difference]: Without dead ends: 2408 [2021-08-12 19:27:51,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1198.8ms TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:27:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-08-12 19:27:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2208. [2021-08-12 19:27:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.490711372904395) internal successors, (5497), 2207 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5497 transitions. [2021-08-12 19:27:52,371 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5497 transitions. Word has length 32 [2021-08-12 19:27:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:52,371 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 5497 transitions. [2021-08-12 19:27:52,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5497 transitions. [2021-08-12 19:27:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:52,373 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:52,373 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:52,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-08-12 19:27:52,574 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 165 times [2021-08-12 19:27:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:52,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418723830] [2021-08-12 19:27:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:52,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418723830] [2021-08-12 19:27:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418723830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948064060] [2021-08-12 19:27:52,780 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 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 [2021-08-12 19:27:52,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:27:52,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:27:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:53,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948064060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:53,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:53,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:27:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334270100] [2021-08-12 19:27:53,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:53,139 INFO L87 Difference]: Start difference. First operand 2208 states and 5497 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:58,062 INFO L93 Difference]: Finished difference Result 2570 states and 6395 transitions. [2021-08-12 19:27:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:27:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:27:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:58,067 INFO L225 Difference]: With dead ends: 2570 [2021-08-12 19:27:58,067 INFO L226 Difference]: Without dead ends: 2496 [2021-08-12 19:27:58,067 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1010.6ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:27:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-08-12 19:27:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2240. [2021-08-12 19:27:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-08-12 19:27:59,408 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-08-12 19:27:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:59,408 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-08-12 19:27:59,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-08-12 19:27:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:27:59,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:59,410 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:59,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2436,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:59,611 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 166 times [2021-08-12 19:27:59,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:59,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128485444] [2021-08-12 19:27:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:59,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128485444] [2021-08-12 19:27:59,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128485444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361694040] [2021-08-12 19:27:59,786 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 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 [2021-08-12 19:27:59,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:59,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:27:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:00,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361694040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:00,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:00,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:00,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419183696] [2021-08-12 19:28:00,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:00,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:00,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:00,261 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:05,027 INFO L93 Difference]: Finished difference Result 2506 states and 6231 transitions. [2021-08-12 19:28:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:28:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:05,033 INFO L225 Difference]: With dead ends: 2506 [2021-08-12 19:28:05,033 INFO L226 Difference]: Without dead ends: 2440 [2021-08-12 19:28:05,033 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1007.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:28:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-12 19:28:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2248. [2021-08-12 19:28:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-08-12 19:28:06,384 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-08-12 19:28:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:06,384 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-08-12 19:28:06,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-08-12 19:28:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:06,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:06,386 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:06,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:06,586 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:06,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 167 times [2021-08-12 19:28:06,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:06,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048060023] [2021-08-12 19:28:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:06,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048060023] [2021-08-12 19:28:06,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048060023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874152577] [2021-08-12 19:28:06,765 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 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 [2021-08-12 19:28:06,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:06,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:06,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874152577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:07,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:07,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:07,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395773851] [2021-08-12 19:28:07,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:07,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:07,244 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:12,147 INFO L93 Difference]: Finished difference Result 2538 states and 6315 transitions. [2021-08-12 19:28:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:28:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:12,152 INFO L225 Difference]: With dead ends: 2538 [2021-08-12 19:28:12,152 INFO L226 Difference]: Without dead ends: 2472 [2021-08-12 19:28:12,152 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1006.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:28:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-12 19:28:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2224. [2021-08-12 19:28:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-08-12 19:28:13,488 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-08-12 19:28:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:13,488 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-08-12 19:28:13,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-08-12 19:28:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:13,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:13,490 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:13,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2465 [2021-08-12 19:28:13,690 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 168 times [2021-08-12 19:28:13,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:13,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168411348] [2021-08-12 19:28:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:13,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168411348] [2021-08-12 19:28:13,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168411348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:13,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063403378] [2021-08-12 19:28:13,901 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 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 [2021-08-12 19:28:13,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:28:13,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:13,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:13,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:14,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063403378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:14,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:14,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:14,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455291683] [2021-08-12 19:28:14,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:14,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:14,455 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:19,477 INFO L93 Difference]: Finished difference Result 2514 states and 6247 transitions. [2021-08-12 19:28:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:28:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:19,482 INFO L225 Difference]: With dead ends: 2514 [2021-08-12 19:28:19,482 INFO L226 Difference]: Without dead ends: 2456 [2021-08-12 19:28:19,483 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:28:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-08-12 19:28:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2232. [2021-08-12 19:28:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-08-12 19:28:20,823 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-08-12 19:28:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:20,823 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-08-12 19:28:20,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-08-12 19:28:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:20,825 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:20,825 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:21,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2481,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:21,026 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 169 times [2021-08-12 19:28:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:21,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772555347] [2021-08-12 19:28:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:21,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:21,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772555347] [2021-08-12 19:28:21,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772555347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:21,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999544579] [2021-08-12 19:28:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:28:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:21,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999544579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:21,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582333485] [2021-08-12 19:28:21,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:21,747 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:26,533 INFO L93 Difference]: Finished difference Result 2442 states and 6067 transitions. [2021-08-12 19:28:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:28:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:26,539 INFO L225 Difference]: With dead ends: 2442 [2021-08-12 19:28:26,539 INFO L226 Difference]: Without dead ends: 2384 [2021-08-12 19:28:26,539 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1078.7ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:28:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-12 19:28:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2224. [2021-08-12 19:28:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-08-12 19:28:27,881 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-08-12 19:28:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-08-12 19:28:27,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-08-12 19:28:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:27,883 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:27,883 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2505 [2021-08-12 19:28:28,084 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 617903418, now seen corresponding path program 170 times [2021-08-12 19:28:28,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:28,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275412939] [2021-08-12 19:28:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:28,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:28,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275412939] [2021-08-12 19:28:28,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275412939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:28,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259335621] [2021-08-12 19:28:28,305 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 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 [2021-08-12 19:28:28,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:28,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:28,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259335621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:28,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:28,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604231934] [2021-08-12 19:28:28,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:28,793 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:33,290 INFO L93 Difference]: Finished difference Result 2402 states and 5975 transitions. [2021-08-12 19:28:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:28:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:33,296 INFO L225 Difference]: With dead ends: 2402 [2021-08-12 19:28:33,296 INFO L226 Difference]: Without dead ends: 2328 [2021-08-12 19:28:33,296 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 970.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:28:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-12 19:28:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2232. [2021-08-12 19:28:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-08-12 19:28:34,645 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-08-12 19:28:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:34,645 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-08-12 19:28:34,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-08-12 19:28:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:34,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:34,647 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:34,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2523,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:34,847 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1638894150, now seen corresponding path program 171 times [2021-08-12 19:28:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:34,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309542491] [2021-08-12 19:28:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:35,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309542491] [2021-08-12 19:28:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309542491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:35,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375934397] [2021-08-12 19:28:35,038 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 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 [2021-08-12 19:28:35,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:28:35,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375934397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:35,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:35,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:35,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417831871] [2021-08-12 19:28:35,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:35,408 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:40,110 INFO L93 Difference]: Finished difference Result 2458 states and 6115 transitions. [2021-08-12 19:28:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:28:40,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:40,115 INFO L225 Difference]: With dead ends: 2458 [2021-08-12 19:28:40,116 INFO L226 Difference]: Without dead ends: 2392 [2021-08-12 19:28:40,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:28:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-08-12 19:28:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2232. [2021-08-12 19:28:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-08-12 19:28:41,494 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-08-12 19:28:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:41,494 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-08-12 19:28:41,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-08-12 19:28:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:41,496 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:41,496 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:41,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2545,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:41,697 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1657142282, now seen corresponding path program 172 times [2021-08-12 19:28:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748789107] [2021-08-12 19:28:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:41,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:41,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748789107] [2021-08-12 19:28:41,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748789107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:41,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120555737] [2021-08-12 19:28:41,889 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 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 [2021-08-12 19:28:41,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:42,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120555737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:42,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:42,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376882478] [2021-08-12 19:28:42,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:42,371 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:46,942 INFO L93 Difference]: Finished difference Result 2466 states and 6131 transitions. [2021-08-12 19:28:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:28:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:46,947 INFO L225 Difference]: With dead ends: 2466 [2021-08-12 19:28:46,947 INFO L226 Difference]: Without dead ends: 2400 [2021-08-12 19:28:46,948 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 883.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:28:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-12 19:28:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2240. [2021-08-12 19:28:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-08-12 19:28:48,329 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-08-12 19:28:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:48,330 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-08-12 19:28:48,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-08-12 19:28:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:28:48,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:48,331 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:48,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2560,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:48,532 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 173 times [2021-08-12 19:28:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:48,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87318023] [2021-08-12 19:28:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:48,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87318023] [2021-08-12 19:28:48,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87318023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51795018] [2021-08-12 19:28:48,784 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 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 [2021-08-12 19:28:48,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:48,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:48,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:28:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51795018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:49,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:28:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748995153] [2021-08-12 19:28:49,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:49,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:49,136 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:53,360 INFO L93 Difference]: Finished difference Result 2370 states and 5891 transitions. [2021-08-12 19:28:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:28:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:28:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:53,366 INFO L225 Difference]: With dead ends: 2370 [2021-08-12 19:28:53,366 INFO L226 Difference]: Without dead ends: 2304 [2021-08-12 19:28:53,366 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:28:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. Received shutdown request... [2021-08-12 19:28:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2240. [2021-08-12 19:28:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:54,934 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:28:54,936 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:28:54,938 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:28:54,938 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:28:54 BasicIcfg [2021-08-12 19:28:54,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:28:54,938 INFO L168 Benchmark]: Toolchain (without parser) took 549307.07 ms. Allocated memory was 127.9 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 108.0 MB in the beginning and 719.5 MB in the end (delta: -611.5 MB). Peak memory consumption was 701.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:28:54,938 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 127.9 MB. Free memory is still 109.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:28:54,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.35 ms. Allocated memory is still 127.9 MB. Free memory was 108.0 MB in the beginning and 106.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:28:54,938 INFO L168 Benchmark]: Boogie Preprocessor took 16.50 ms. Allocated memory is still 127.9 MB. Free memory was 106.6 MB in the beginning and 105.6 MB in the end (delta: 933.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:28:54,938 INFO L168 Benchmark]: RCFGBuilder took 276.74 ms. Allocated memory is still 127.9 MB. Free memory was 105.5 MB in the beginning and 91.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-12 19:28:54,938 INFO L168 Benchmark]: TraceAbstraction took 548984.32 ms. Allocated memory was 127.9 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 91.1 MB in the beginning and 719.5 MB in the end (delta: -628.5 MB). Peak memory consumption was 683.3 MB. Max. memory is 8.0 GB. [2021-08-12 19:28:54,939 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 127.9 MB. Free memory is still 109.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.35 ms. Allocated memory is still 127.9 MB. Free memory was 108.0 MB in the beginning and 106.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.50 ms. Allocated memory is still 127.9 MB. Free memory was 106.6 MB in the beginning and 105.6 MB in the end (delta: 933.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.74 ms. Allocated memory is still 127.9 MB. Free memory was 105.5 MB in the beginning and 91.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 548984.32 ms. Allocated memory was 127.9 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 91.1 MB in the beginning and 719.5 MB in the end (delta: -628.5 MB). Peak memory consumption was 683.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 36 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 548882.4ms, OverallIterations: 184, TraceHistogramMax: 8, EmptinessCheckTime: 219.4ms, AutomataDifference: 330426.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3591 SDtfs, 23105 SDslu, 29670 SDs, 0 SdLazy, 37262 SolverSat, 8916 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19069.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9631 GetRequests, 3707 SyntacticMatches, 0 SemanticMatches, 5924 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54789 ImplicationChecksByTransitivity, 123837.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2248occurred in iteration=177, InterpolantAutomatonStates: 3264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78326.5ms AutomataMinimizationTime, 184 MinimizatonAttempts, 25976 StatesRemovedByMinimization, 180 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 627.2ms SsaConstructionTime, 2070.7ms SatisfiabilityAnalysisTime, 95897.8ms InterpolantComputationTime, 10516 NumberOfCodeBlocks, 10516 NumberOfCodeBlocksAsserted, 830 NumberOfCheckSat, 10151 ConstructedInterpolants, 0 QuantifiedInterpolants, 126329 SizeOfPredicates, 535 NumberOfNonLiveVariables, 9942 ConjunctsInSsa, 2443 ConjunctsInUnsatCore, 365 InterpolantComputations, 3 PerfectInterpolantSequences, 1194/11699 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