/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:06:46,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:06:46,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:06:46,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:06:46,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:06:46,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:06:46,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:06:46,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:06:46,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:06:46,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:06:46,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:06:46,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:06:46,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:06:46,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:06:46,746 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:06:46,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:06:46,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:06:46,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:06:46,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:06:46,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:06:46,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:06:46,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:06:46,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:06:46,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:06:46,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:06:46,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:06:46,749 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:06:46,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:06:47,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:06:47,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:06:47,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:06:47,035 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:06:47,036 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:06:47,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-06-05 16:06:47,037 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-06-05 16:06:47,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:06:47,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:06:47,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:06:47,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:06:47,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:06:47,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:06:47,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:06:47,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:06:47,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:06:47,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... [2021-06-05 16:06:47,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:06:47,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:06:47,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:06:47,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:06:47,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:06:47,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:06:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:06:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:06:47,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:06:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:06:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:06:47,323 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:06:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:06:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:06:47,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:06:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:06:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:06:47,325 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:06:47,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:06:47,603 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:06:47,605 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:06:47 BoogieIcfgContainer [2021-06-05 16:06:47,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:06:47,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:06:47,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:06:47,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:06:47,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:06:47" (1/2) ... [2021-06-05 16:06:47,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c2d8e3 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:06:47, skipping insertion in model container [2021-06-05 16:06:47,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:06:47" (2/2) ... [2021-06-05 16:06:47,618 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-06-05 16:06:47,623 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:06:47,623 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:06:47,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:06:47,624 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:06:47,668 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:06:47,686 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:06:47,701 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:06:47,701 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:06:47,701 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:06:47,701 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:06:47,701 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:06:47,701 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:06:47,701 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:06:47,702 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:06:47,710 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-06-05 16:06:47,855 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:06:47,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:47,884 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:47,884 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash 425333675, now seen corresponding path program 1 times [2021-06-05 16:06:47,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:47,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378983254] [2021-06-05 16:06:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:48,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378983254] [2021-06-05 16:06:48,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378983254] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:48,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:48,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:06:48,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218061838] [2021-06-05 16:06:48,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,057 INFO L87 Difference]: Start difference. First operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:48,116 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-06-05 16:06:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-06-05 16:06:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,142 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 16:06:48,142 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 16:06:48,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 16:06:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 16:06:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-06-05 16:06:48,254 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-06-05 16:06:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:48,255 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-06-05 16:06:48,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-06-05 16:06:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:06:48,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:48,259 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:48,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:06:48,260 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash -765277692, now seen corresponding path program 1 times [2021-06-05 16:06:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:48,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820448405] [2021-06-05 16:06:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820448405] [2021-06-05 16:06:48,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820448405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:48,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:48,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836996072] [2021-06-05 16:06:48,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:48,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,296 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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) [2021-06-05 16:06:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:48,320 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-06-05 16:06:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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 27 [2021-06-05 16:06:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,333 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 16:06:48,333 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 16:06:48,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 16:06:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-06-05 16:06:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-06-05 16:06:48,381 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-06-05 16:06:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:48,382 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-06-05 16:06:48,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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) [2021-06-05 16:06:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-06-05 16:06:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:06:48,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:48,386 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:48,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:06:48,387 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash 562503080, now seen corresponding path program 2 times [2021-06-05 16:06:48,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:48,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809588890] [2021-06-05 16:06:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:48,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809588890] [2021-06-05 16:06:48,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809588890] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:48,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:48,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:06:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34552090] [2021-06-05 16:06:48,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,460 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-06-05 16:06:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:48,479 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-06-05 16:06:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 27 [2021-06-05 16:06:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,485 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 16:06:48,486 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 16:06:48,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 16:06:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-06-05 16:06:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 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) [2021-06-05 16:06:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-06-05 16:06:48,521 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-06-05 16:06:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:48,522 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-06-05 16:06:48,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-06-05 16:06:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-06-05 16:06:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:06:48,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:48,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:48,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:06:48,526 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 630436378, now seen corresponding path program 1 times [2021-06-05 16:06:48,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:48,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486384358] [2021-06-05 16:06:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:48,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486384358] [2021-06-05 16:06:48,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486384358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:48,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:48,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:06:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264038006] [2021-06-05 16:06:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:48,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,583 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:48,606 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-06-05 16:06:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:06:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,614 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 16:06:48,614 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 16:06:48,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 16:06:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-06-05 16:06:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-06-05 16:06:48,649 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-06-05 16:06:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:48,650 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-06-05 16:06:48,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-06-05 16:06:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:48,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:48,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:48,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 16:06:48,657 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash -321367481, now seen corresponding path program 1 times [2021-06-05 16:06:48,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:48,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373393168] [2021-06-05 16:06:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:48,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373393168] [2021-06-05 16:06:48,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373393168] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:48,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:06:48,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:06:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374255048] [2021-06-05 16:06:48,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:06:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:06:48,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,687 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:48,698 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-06-05 16:06:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:06:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:48,703 INFO L225 Difference]: With dead ends: 915 [2021-06-05 16:06:48,703 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 16:06:48,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:06:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 16:06:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-06-05 16:06:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-06-05 16:06:48,729 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-06-05 16:06:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:48,729 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-06-05 16:06:48,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-06-05 16:06:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:06:48,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:48,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:48,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:06:48,732 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1106779099, now seen corresponding path program 2 times [2021-06-05 16:06:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:48,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292992724] [2021-06-05 16:06:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:48,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292992724] [2021-06-05 16:06:48,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292992724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656226357] [2021-06-05 16:06:48,776 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:48,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:48,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:06:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:49,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:49,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:49,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:49,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:49,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:06:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656226357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:49,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:06:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371403773] [2021-06-05 16:06:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:06:49,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:06:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:06:49,058 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:49,135 INFO L93 Difference]: Finished difference Result 1329 states and 3816 transitions. [2021-06-05 16:06:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:06:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:06:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:49,141 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:06:49,141 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:06:49,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:06:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:06:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1260. [2021-06-05 16:06:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.871326449563145) internal successors, (3615), 1259 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3615 transitions. [2021-06-05 16:06:49,175 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3615 transitions. Word has length 37 [2021-06-05 16:06:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:49,175 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 3615 transitions. [2021-06-05 16:06:49,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3615 transitions. [2021-06-05 16:06:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:49,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:49,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:49,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 16:06:49,402 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1059420440, now seen corresponding path program 3 times [2021-06-05 16:06:49,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:49,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508792290] [2021-06-05 16:06:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:49,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508792290] [2021-06-05 16:06:49,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508792290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559336372] [2021-06-05 16:06:49,509 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:49,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:06:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:06:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559336372] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 16:06:49,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-06-05 16:06:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478218195] [2021-06-05 16:06:49,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:06:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:06:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:06:49,635 INFO L87 Difference]: Start difference. First operand 1260 states and 3615 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:49,659 INFO L93 Difference]: Finished difference Result 2714 states and 7974 transitions. [2021-06-05 16:06:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:06:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 16:06:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:49,671 INFO L225 Difference]: With dead ends: 2714 [2021-06-05 16:06:49,672 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:06:49,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:06:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:06:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2421. [2021-06-05 16:06:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.997520661157025) internal successors, (7254), 2420 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 7254 transitions. [2021-06-05 16:06:49,736 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 7254 transitions. Word has length 42 [2021-06-05 16:06:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 7254 transitions. [2021-06-05 16:06:49,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 7254 transitions. [2021-06-05 16:06:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 16:06:49,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:49,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:49,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:49,958 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash 41400296, now seen corresponding path program 4 times [2021-06-05 16:06:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:49,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667442213] [2021-06-05 16:06:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:50,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667442213] [2021-06-05 16:06:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667442213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084129906] [2021-06-05 16:06:50,065 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:50,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:50,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 16:06:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:50,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:50,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 16:06:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:50,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:50,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:06:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:50,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084129906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:50,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:06:50,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400250189] [2021-06-05 16:06:50,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:06:50,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:50,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:06:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:06:50,265 INFO L87 Difference]: Start difference. First operand 2421 states and 7254 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-06-05 16:06:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:50,439 INFO L93 Difference]: Finished difference Result 2592 states and 7796 transitions. [2021-06-05 16:06:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:06:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 42 [2021-06-05 16:06:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:50,453 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 16:06:50,453 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 16:06:50,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:06:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 16:06:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2369. [2021-06-05 16:06:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.00464527027027) internal successors, (7115), 2368 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 7115 transitions. [2021-06-05 16:06:50,562 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 7115 transitions. Word has length 42 [2021-06-05 16:06:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:50,563 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 7115 transitions. [2021-06-05 16:06:50,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-06-05 16:06:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 7115 transitions. [2021-06-05 16:06:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 16:06:50,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:50,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:50,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:50,785 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2037460374, now seen corresponding path program 5 times [2021-06-05 16:06:50,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:50,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864523028] [2021-06-05 16:06:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:50,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:50,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864523028] [2021-06-05 16:06:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864523028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864845292] [2021-06-05 16:06:50,853 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:50,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:06:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:06:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:51,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864845292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:51,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:51,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-05 16:06:51,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113734315] [2021-06-05 16:06:51,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:06:51,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:06:51,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:06:51,010 INFO L87 Difference]: Start difference. First operand 2369 states and 7115 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:51,037 INFO L93 Difference]: Finished difference Result 4663 states and 13882 transitions. [2021-06-05 16:06:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:06:51,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 16:06:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:51,072 INFO L225 Difference]: With dead ends: 4663 [2021-06-05 16:06:51,073 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 16:06:51,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:06:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 16:06:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3953. [2021-06-05 16:06:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.0587044534412957) internal successors, (12088), 3952 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 12088 transitions. [2021-06-05 16:06:51,203 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 12088 transitions. Word has length 47 [2021-06-05 16:06:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:51,204 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 12088 transitions. [2021-06-05 16:06:51,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 12088 transitions. [2021-06-05 16:06:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 16:06:51,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:51,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:51,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:51,436 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 31320406, now seen corresponding path program 6 times [2021-06-05 16:06:51,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:51,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333472380] [2021-06-05 16:06:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:51,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333472380] [2021-06-05 16:06:51,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333472380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940477321] [2021-06-05 16:06:51,684 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:51,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:06:51,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:51,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:06:51,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:51,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 16:06:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 16:06:51,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:51,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:51,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:15 [2021-06-05 16:06:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940477321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:52,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 16:06:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248534528] [2021-06-05 16:06:52,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:06:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:52,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:06:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:06:52,183 INFO L87 Difference]: Start difference. First operand 3953 states and 12088 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:52,901 INFO L93 Difference]: Finished difference Result 4432 states and 13258 transitions. [2021-06-05 16:06:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:06:52,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 16:06:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:52,913 INFO L225 Difference]: With dead ends: 4432 [2021-06-05 16:06:52,913 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 16:06:52,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:06:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 16:06:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3885. [2021-06-05 16:06:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.058444902162719) internal successors, (11879), 3884 states have internal predecessors, (11879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 11879 transitions. [2021-06-05 16:06:53,006 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 11879 transitions. Word has length 47 [2021-06-05 16:06:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:53,007 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 11879 transitions. [2021-06-05 16:06:53,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 11879 transitions. [2021-06-05 16:06:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 16:06:53,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:53,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:53,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 16:06:53,239 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2006073215, now seen corresponding path program 7 times [2021-06-05 16:06:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:53,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655685869] [2021-06-05 16:06:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:06:53,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655685869] [2021-06-05 16:06:53,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655685869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348247690] [2021-06-05 16:06:53,286 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:06:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:06:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348247690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:06:53,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 16:06:53,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-06-05 16:06:53,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318399974] [2021-06-05 16:06:53,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:06:53,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:06:53,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:06:53,463 INFO L87 Difference]: Start difference. First operand 3885 states and 11879 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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) [2021-06-05 16:06:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:53,470 INFO L93 Difference]: Finished difference Result 836 states and 2021 transitions. [2021-06-05 16:06:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:06:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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 52 [2021-06-05 16:06:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:53,472 INFO L225 Difference]: With dead ends: 836 [2021-06-05 16:06:53,472 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 16:06:53,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:06:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 16:06:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 689. [2021-06-05 16:06:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.457848837209302) internal successors, (1691), 688 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1691 transitions. [2021-06-05 16:06:53,485 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1691 transitions. Word has length 52 [2021-06-05 16:06:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:53,486 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1691 transitions. [2021-06-05 16:06:53,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 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) [2021-06-05 16:06:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1691 transitions. [2021-06-05 16:06:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 16:06:53,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:53,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:53,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:53,701 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 535250071, now seen corresponding path program 8 times [2021-06-05 16:06:53,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:53,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160167248] [2021-06-05 16:06:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:06:53,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:53,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160167248] [2021-06-05 16:06:53,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160167248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:53,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901495814] [2021-06-05 16:06:53,804 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:53,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 16:06:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:53,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:53,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:53,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:53,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:06:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:06:53,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901495814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:53,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:53,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 16:06:53,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301796151] [2021-06-05 16:06:53,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:06:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:06:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:06:53,965 INFO L87 Difference]: Start difference. First operand 689 states and 1691 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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) [2021-06-05 16:06:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:54,061 INFO L93 Difference]: Finished difference Result 629 states and 1516 transitions. [2021-06-05 16:06:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:06:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 52 [2021-06-05 16:06:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:54,062 INFO L225 Difference]: With dead ends: 629 [2021-06-05 16:06:54,062 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 16:06:54,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:06:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 16:06:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-06-05 16:06:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-06-05 16:06:54,091 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-06-05 16:06:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:54,092 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-06-05 16:06:54,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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) [2021-06-05 16:06:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-06-05 16:06:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 16:06:54,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:54,093 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:54,316 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1828697708, now seen corresponding path program 9 times [2021-06-05 16:06:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:54,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393266491] [2021-06-05 16:06:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:06:54,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:54,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393266491] [2021-06-05 16:06:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393266491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:54,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884844330] [2021-06-05 16:06:54,536 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 [2021-06-05 16:06:54,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:06:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:54,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:54,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:06:54,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:06:54,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:54,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:54,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2021-06-05 16:06:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:54,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 16:06:54,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:54,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 16:06:54,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:54,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:54,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:06:54,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:52, output treesize:22 [2021-06-05 16:06:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:55,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884844330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:55,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:55,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 16:06:55,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315511910] [2021-06-05 16:06:55,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:55,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:55,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:55,140 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:55,941 INFO L93 Difference]: Finished difference Result 619 states and 1454 transitions. [2021-06-05 16:06:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:06:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 16:06:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:55,942 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:06:55,943 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:06:55,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:06:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:06:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 584. [2021-06-05 16:06:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.3825042881646654) internal successors, (1389), 583 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1389 transitions. [2021-06-05 16:06:55,953 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1389 transitions. Word has length 57 [2021-06-05 16:06:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:55,954 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1389 transitions. [2021-06-05 16:06:55,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 23 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1389 transitions. [2021-06-05 16:06:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 16:06:55,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:55,955 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:56,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 16:06:56,169 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1694652934, now seen corresponding path program 10 times [2021-06-05 16:06:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:56,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448967338] [2021-06-05 16:06:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:56,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:56,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448967338] [2021-06-05 16:06:56,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448967338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:56,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064333667] [2021-06-05 16:06:56,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:56,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:06:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:56,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:56,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:56,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:56,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 16:06:56,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:06:56,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:56,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:56,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:06:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:06:56,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064333667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:56,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:56,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-06-05 16:06:56,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228969552] [2021-06-05 16:06:56,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:06:56,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:06:56,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:06:56,622 INFO L87 Difference]: Start difference. First operand 584 states and 1389 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:57,009 INFO L93 Difference]: Finished difference Result 578 states and 1357 transitions. [2021-06-05 16:06:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:06:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 16:06:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:57,011 INFO L225 Difference]: With dead ends: 578 [2021-06-05 16:06:57,011 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 16:06:57,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:06:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 16:06:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 559. [2021-06-05 16:06:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-06-05 16:06:57,020 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-06-05 16:06:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:57,020 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-06-05 16:06:57,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-06-05 16:06:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 16:06:57,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:57,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:57,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:57,245 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1465250578, now seen corresponding path program 11 times [2021-06-05 16:06:57,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:57,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411440708] [2021-06-05 16:06:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:06:58,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:58,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411440708] [2021-06-05 16:06:58,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411440708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:58,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097750570] [2021-06-05 16:06:58,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:58,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:06:58,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 16:06:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:58,706 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:06:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:06:58,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:58,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:56 [2021-06-05 16:06:58,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:58,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:58,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:06:58,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:58,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:58,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:35 [2021-06-05 16:06:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:59,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 16:06:59,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:17 [2021-06-05 16:06:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:06:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097750570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:59,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:59,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-06-05 16:06:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680431046] [2021-06-05 16:06:59,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 16:06:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 16:06:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:06:59,206 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:01,823 INFO L93 Difference]: Finished difference Result 653 states and 1524 transitions. [2021-06-05 16:07:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:07:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 16:07:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:01,824 INFO L225 Difference]: With dead ends: 653 [2021-06-05 16:07:01,824 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 16:07:01,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3215.6ms TimeCoverageRelationStatistics Valid=539, Invalid=3751, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:07:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 16:07:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 16:07:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 16:07:01,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-06-05 16:07:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:01,825 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 16:07:01,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 16:07:01,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 16:07:02,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:02,034 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:07:02,036 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:07:02 BasicIcfg [2021-06-05 16:07:02,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:07:02,036 INFO L168 Benchmark]: Toolchain (without parser) took 14843.88 ms. Allocated memory was 398.5 MB in the beginning and 660.6 MB in the end (delta: 262.1 MB). Free memory was 378.2 MB in the beginning and 504.6 MB in the end (delta: -126.4 MB). Peak memory consumption was 138.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:02,036 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 398.5 MB. Free memory was 379.5 MB in the beginning and 379.4 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:07:02,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 398.5 MB. Free memory was 378.2 MB in the beginning and 376.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:07:02,037 INFO L168 Benchmark]: Boogie Preprocessor took 15.93 ms. Allocated memory is still 398.5 MB. Free memory was 376.7 MB in the beginning and 375.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:02,037 INFO L168 Benchmark]: RCFGBuilder took 363.16 ms. Allocated memory is still 398.5 MB. Free memory was 375.6 MB in the beginning and 357.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:02,037 INFO L168 Benchmark]: TraceAbstraction took 14429.73 ms. Allocated memory was 398.5 MB in the beginning and 660.6 MB in the end (delta: 262.1 MB). Free memory was 357.2 MB in the beginning and 504.6 MB in the end (delta: -147.4 MB). Peak memory consumption was 117.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:07:02,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 398.5 MB. Free memory was 379.5 MB in the beginning and 379.4 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 398.5 MB. Free memory was 378.2 MB in the beginning and 376.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.93 ms. Allocated memory is still 398.5 MB. Free memory was 376.7 MB in the beginning and 375.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 363.16 ms. Allocated memory is still 398.5 MB. Free memory was 375.6 MB in the beginning and 357.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 14429.73 ms. Allocated memory was 398.5 MB in the beginning and 660.6 MB in the end (delta: 262.1 MB). Free memory was 357.2 MB in the beginning and 504.6 MB in the end (delta: -147.4 MB). Peak memory consumption was 117.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14334.2ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 79.9ms, AutomataDifference: 5253.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 153.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 839 SDtfs, 2446 SDslu, 4690 SDs, 0 SdLazy, 2601 SolverSat, 470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1510.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 669 GetRequests, 452 SyntacticMatches, 6 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 5511.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3953occurred in iteration=9, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 724.3ms AutomataMinimizationTime, 15 MinimizatonAttempts, 1863 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 124.0ms SsaConstructionTime, 433.3ms SatisfiabilityAnalysisTime, 4906.6ms InterpolantComputationTime, 1135 NumberOfCodeBlocks, 1135 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1110 ConstructedInterpolants, 7 QuantifiedInterpolants, 7258 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1280 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 164/407 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...