/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:16:34,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:16:34,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:16:34,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:16:34,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:16:34,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:16:34,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:16:34,557 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 15:16:34,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:16:34,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:16:34,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:16:34,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:16:34,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:16:34,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:16:34,613 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:16:34,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:16:34,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:16:34,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:16:34,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:16:34,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:16:34,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:16:34,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:16:34,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:16:34,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:16:34,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:16:34,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:16:34,617 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:16:34,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:16:35,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:16:35,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:16:35,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:16:35,240 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:16:35,241 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:16:35,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-06-05 15:16:35,242 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-06-05 15:16:35,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:16:35,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:16:35,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:16:35,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:16:35,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:16:35,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:16:35,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:16:35,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:16:35,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:16:35,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/1) ... [2021-06-05 15:16:35,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:16:35,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:16:35,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:16:35,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:16:35,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (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 15:16:35,501 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:16:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:16:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:16:35,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:16:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:16:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:16:35,519 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:16:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:16:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:16:35,519 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:16:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:16:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:16:35,520 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:16:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:16:35,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:16:35,521 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 15:16:35,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:16:35,872 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:16:35,874 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:16:35 BoogieIcfgContainer [2021-06-05 15:16:35,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:16:35,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:16:35,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:16:35,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:16:35,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:16:35" (1/2) ... [2021-06-05 15:16:35,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a251230 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:16:35, skipping insertion in model container [2021-06-05 15:16:35,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:16:35" (2/2) ... [2021-06-05 15:16:35,880 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-06-05 15:16:35,901 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:16:35,901 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:16:35,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:16:35,902 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:16:36,032 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:16:36,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:16:36,143 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:16:36,143 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:16:36,143 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:16:36,143 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:16:36,143 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:16:36,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:16:36,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:16:36,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:16:36,176 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-06-05 15:16:36,283 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:16:36,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:36,324 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] [2021-06-05 15:16:36,324 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash 187435854, now seen corresponding path program 1 times [2021-06-05 15:16:36,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:36,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594957707] [2021-06-05 15:16:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:36,778 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 15:16:36,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594957707] [2021-06-05 15:16:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594957707] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:36,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:36,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:16:36,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721475685] [2021-06-05 15:16:36,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:16:36,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:36,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:16:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:16:36,804 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:36,900 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-06-05 15:16:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:16:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:16:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:36,932 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 15:16:36,932 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 15:16:36,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:16:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 15:16:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-06-05 15:16:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-06-05 15:16:37,049 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-06-05 15:16:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,050 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-06-05 15:16:37,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-06-05 15:16:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:37,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,056 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 15:16:37,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:16:37,057 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 801929296, now seen corresponding path program 1 times [2021-06-05 15:16:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066690148] [2021-06-05 15:16:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,120 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 15:16:37,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066690148] [2021-06-05 15:16:37,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066690148] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:37,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:37,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:16:37,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162209980] [2021-06-05 15:16:37,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:16:37,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:16:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:16:37,124 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,223 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-06-05 15:16:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:16:37,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,234 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 15:16:37,234 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 15:16:37,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:16:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 15:16:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-06-05 15:16:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-06-05 15:16:37,274 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-06-05 15:16:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,275 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-06-05 15:16:37,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-06-05 15:16:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:37,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,279 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 15:16:37,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:16:37,279 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2091759792, now seen corresponding path program 1 times [2021-06-05 15:16:37,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:37,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340213509] [2021-06-05 15:16:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,332 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 15:16:37,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340213509] [2021-06-05 15:16:37,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340213509] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:37,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:37,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:16:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699714613] [2021-06-05 15:16:37,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:16:37,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:16:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:16:37,335 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:16:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,444 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-06-05 15:16:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:16:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:16:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,454 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 15:16:37,454 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 15:16:37,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 15:16:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-06-05 15:16:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-06-05 15:16:37,493 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-06-05 15:16:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,493 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-06-05 15:16:37,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 15:16:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-06-05 15:16:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:37,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,497 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 15:16:37,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:16:37,497 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:37,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-06-05 15:16:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:37,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440110214] [2021-06-05 15:16:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,552 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 15:16:37,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440110214] [2021-06-05 15:16:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440110214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:37,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:37,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:16:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507114566] [2021-06-05 15:16:37,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:16:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:16:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:16:37,554 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,620 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-06-05 15:16:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:16:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,627 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 15:16:37,628 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 15:16:37,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:16:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 15:16:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-06-05 15:16:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-06-05 15:16:37,658 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-06-05 15:16:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,658 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-06-05 15:16:37,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 15:16:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-06-05 15:16:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:37,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,662 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 15:16:37,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:16:37,662 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-06-05 15:16:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:37,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927777182] [2021-06-05 15:16:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,704 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 15:16:37,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927777182] [2021-06-05 15:16:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927777182] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:37,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:37,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:16:37,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676444127] [2021-06-05 15:16:37,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:16:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:16:37,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:16:37,706 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:16:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,801 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-06-05 15:16:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:16:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:16:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,813 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 15:16:37,813 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 15:16:37,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:16:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 15:16:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-06-05 15:16:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-06-05 15:16:37,851 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-06-05 15:16:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,851 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-06-05 15:16:37,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 15:16:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-06-05 15:16:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:37,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,854 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 15:16:37,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:16:37,854 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:37,855 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-06-05 15:16:37,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:37,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813991175] [2021-06-05 15:16:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,893 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 15:16:37,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813991175] [2021-06-05 15:16:37,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813991175] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:37,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:37,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:16:37,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651745634] [2021-06-05 15:16:37,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:16:37,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:16:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:16:37,895 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,991 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-06-05 15:16:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:16:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:38,003 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 15:16:38,003 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 15:16:38,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:16:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 15:16:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-06-05 15:16:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-06-05 15:16:38,049 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-06-05 15:16:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:38,053 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-06-05 15:16:38,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-06-05 15:16:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:16:38,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:38,057 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 15:16:38,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 15:16:38,057 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-06-05 15:16:38,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:38,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87092162] [2021-06-05 15:16:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,119 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 15:16:38,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:38,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87092162] [2021-06-05 15:16:38,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87092162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:38,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:38,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:16:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779967699] [2021-06-05 15:16:38,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:16:38,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:38,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:16:38,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:16:38,121 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:38,183 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-06-05 15:16:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:16:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:38,191 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 15:16:38,191 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 15:16:38,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:16:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 15:16:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-06-05 15:16:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-06-05 15:16:38,221 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-06-05 15:16:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:38,222 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-06-05 15:16:38,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 15:16:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-06-05 15:16:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:16:38,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:38,226 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] [2021-06-05 15:16:38,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:16:38,226 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-06-05 15:16:38,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:38,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665004568] [2021-06-05 15:16:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665004568] [2021-06-05 15:16:38,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665004568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026576451] [2021-06-05 15:16:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:16:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026576451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:38,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 15:16:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473014927] [2021-06-05 15:16:38,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:16:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:16:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:16:38,616 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:38,724 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-06-05 15:16:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:16:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:16:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:38,733 INFO L225 Difference]: With dead ends: 1388 [2021-06-05 15:16:38,733 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 15:16:38,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 15:16:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-06-05 15:16:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-06-05 15:16:38,775 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-06-05 15:16:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:38,775 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-06-05 15:16:38,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-06-05 15:16:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:16:38,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:38,778 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] [2021-06-05 15:16:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 15:16:38,993 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-06-05 15:16:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751107892] [2021-06-05 15:16:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:39,015 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 15:16:39,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:39,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751107892] [2021-06-05 15:16:39,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751107892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:39,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:39,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:16:39,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985946379] [2021-06-05 15:16:39,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:16:39,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:16:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:16:39,017 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:39,060 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-06-05 15:16:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:16:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:16:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:39,067 INFO L225 Difference]: With dead ends: 1113 [2021-06-05 15:16:39,067 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 15:16:39,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:16:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 15:16:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-06-05 15:16:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-06-05 15:16:39,093 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-06-05 15:16:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:39,094 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-06-05 15:16:39,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-06-05 15:16:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:39,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:39,097 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] [2021-06-05 15:16:39,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 15:16:39,097 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:39,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-06-05 15:16:39,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:39,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467544792] [2021-06-05 15:16:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:39,124 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 15:16:39,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:39,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467544792] [2021-06-05 15:16:39,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467544792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720106762] [2021-06-05 15:16:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:16:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:16:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:39,271 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 15:16:39,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720106762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:39,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:39,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:16:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177236554] [2021-06-05 15:16:39,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:16:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:16:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:16:39,273 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:39,335 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-06-05 15:16:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:16:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:16:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:39,342 INFO L225 Difference]: With dead ends: 1404 [2021-06-05 15:16:39,343 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 15:16:39,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 15:16:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-06-05 15:16:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-06-05 15:16:39,374 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-06-05 15:16:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:39,374 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-06-05 15:16:39,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-06-05 15:16:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:39,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:39,378 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] [2021-06-05 15:16:39,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:16:39,596 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-06-05 15:16:39,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:39,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521897722] [2021-06-05 15:16:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:39,641 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 15:16:39,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521897722] [2021-06-05 15:16:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521897722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32655914] [2021-06-05 15:16:39,642 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 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 15:16:39,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:39,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:16:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:39,830 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 15:16:39,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32655914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:39,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:16:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-05 15:16:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361763067] [2021-06-05 15:16:39,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:16:39,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:39,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:16:39,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:16:39,831 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:39,864 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-06-05 15:16:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:16:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:16:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:39,869 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 15:16:39,869 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 15:16:39,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:16:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 15:16:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-06-05 15:16:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-06-05 15:16:39,899 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-06-05 15:16:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:39,899 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-06-05 15:16:39,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-06-05 15:16:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:16:39,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:39,902 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] [2021-06-05 15:16:40,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:16:40,117 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-06-05 15:16:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:40,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22494949] [2021-06-05 15:16:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22494949] [2021-06-05 15:16:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22494949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178915309] [2021-06-05 15:16:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:16:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:16:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:40,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178915309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:40,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 15:16:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212546240] [2021-06-05 15:16:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:16:40,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:40,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:16:40,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:40,318 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:40,385 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-06-05 15:16:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:16:40,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:16:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:40,397 INFO L225 Difference]: With dead ends: 3683 [2021-06-05 15:16:40,397 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 15:16:40,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 15:16:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-06-05 15:16:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-06-05 15:16:40,466 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-06-05 15:16:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:40,467 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-06-05 15:16:40,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-06-05 15:16:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:16:40,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:40,472 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] [2021-06-05 15:16:40,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:40,695 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:40,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-06-05 15:16:40,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:40,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069171997] [2021-06-05 15:16:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:40,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069171997] [2021-06-05 15:16:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069171997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401050227] [2021-06-05 15:16:40,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:40,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:16:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401050227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:40,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 15:16:40,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945298473] [2021-06-05 15:16:40,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:16:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:16:40,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:16:40,869 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:40,962 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-06-05 15:16:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:16:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:16:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:40,980 INFO L225 Difference]: With dead ends: 5705 [2021-06-05 15:16:40,981 INFO L226 Difference]: Without dead ends: 5282 [2021-06-05 15:16:40,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-06-05 15:16:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-06-05 15:16:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-06-05 15:16:41,115 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-06-05 15:16:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:41,115 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-06-05 15:16:41,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-06-05 15:16:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:16:41,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:41,123 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] [2021-06-05 15:16:41,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:16:41,346 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-06-05 15:16:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:41,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621202351] [2021-06-05 15:16:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:41,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621202351] [2021-06-05 15:16:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621202351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327357148] [2021-06-05 15:16:41,409 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 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 15:16:41,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:16:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327357148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:41,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:41,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 15:16:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716432261] [2021-06-05 15:16:41,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:16:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:16:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:16:41,528 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:41,622 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-06-05 15:16:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:16:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:16:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:41,641 INFO L225 Difference]: With dead ends: 5724 [2021-06-05 15:16:41,642 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 15:16:41,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:16:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 15:16:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-06-05 15:16:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-06-05 15:16:41,736 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-06-05 15:16:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:41,736 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-06-05 15:16:41,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-06-05 15:16:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:41,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:41,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:41,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:41,967 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-06-05 15:16:41,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:41,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420507744] [2021-06-05 15:16:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:42,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:42,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420507744] [2021-06-05 15:16:42,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420507744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886041085] [2021-06-05 15:16:42,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:42,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:42,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:16:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:42,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886041085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:42,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 15:16:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481035501] [2021-06-05 15:16:42,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:16:42,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:16:42,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:16:42,218 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:42,568 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-06-05 15:16:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:16:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:16:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:42,588 INFO L225 Difference]: With dead ends: 6143 [2021-06-05 15:16:42,588 INFO L226 Difference]: Without dead ends: 6077 [2021-06-05 15:16:42,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:16:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-06-05 15:16:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-06-05 15:16:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-06-05 15:16:42,691 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-06-05 15:16:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:42,691 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-06-05 15:16:42,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-06-05 15:16:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:42,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:42,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:42,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:16:42,921 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-06-05 15:16:42,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:42,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934980057] [2021-06-05 15:16:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:42,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934980057] [2021-06-05 15:16:42,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934980057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914562093] [2021-06-05 15:16:42,957 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 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 15:16:42,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:16:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:16:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:43,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914562093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:43,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:43,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:16:43,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486465766] [2021-06-05 15:16:43,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:16:43,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:43,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:16:43,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:43,096 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:43,358 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-06-05 15:16:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:16:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:43,392 INFO L225 Difference]: With dead ends: 10702 [2021-06-05 15:16:43,392 INFO L226 Difference]: Without dead ends: 10294 [2021-06-05 15:16:43,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:16:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-05 15:16:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-06-05 15:16:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-06-05 15:16:43,559 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-06-05 15:16:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:43,559 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-06-05 15:16:43,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-06-05 15:16:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:43,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:43,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:43,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:16:43,793 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-06-05 15:16:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046722074] [2021-06-05 15:16:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:43,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:43,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046722074] [2021-06-05 15:16:43,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046722074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:43,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981115577] [2021-06-05 15:16:43,857 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 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 15:16:43,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:16:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:16:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:44,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981115577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:44,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 15:16:44,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567265244] [2021-06-05 15:16:44,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:16:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:16:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:44,010 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:44,517 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-06-05 15:16:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:16:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:16:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:44,538 INFO L225 Difference]: With dead ends: 7423 [2021-06-05 15:16:44,538 INFO L226 Difference]: Without dead ends: 7391 [2021-06-05 15:16:44,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:16:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-06-05 15:16:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-06-05 15:16:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-06-05 15:16:44,694 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-06-05 15:16:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:44,694 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-06-05 15:16:44,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-06-05 15:16:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:44,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:44,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:44,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:16:44,925 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-06-05 15:16:44,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:44,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543671640] [2021-06-05 15:16:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:44,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543671640] [2021-06-05 15:16:44,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543671640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263300139] [2021-06-05 15:16:44,974 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 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 15:16:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:16:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263300139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:45,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:45,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 15:16:45,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893776313] [2021-06-05 15:16:45,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:16:45,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:16:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:16:45,133 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 15:16:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:45,688 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-06-05 15:16:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:16:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 35 [2021-06-05 15:16:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:45,737 INFO L225 Difference]: With dead ends: 17746 [2021-06-05 15:16:45,737 INFO L226 Difference]: Without dead ends: 17648 [2021-06-05 15:16:45,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:45,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-06-05 15:16:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-06-05 15:16:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-06-05 15:16:46,155 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-06-05 15:16:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:46,155 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-06-05 15:16:46,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 15:16:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-06-05 15:16:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:46,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:46,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:46,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:16:46,393 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-06-05 15:16:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:46,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868277512] [2021-06-05 15:16:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:46,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868277512] [2021-06-05 15:16:46,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868277512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118499000] [2021-06-05 15:16:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:46,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:16:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118499000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:16:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651233149] [2021-06-05 15:16:46,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:16:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:16:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:46,678 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:47,232 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-06-05 15:16:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:16:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:16:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:47,299 INFO L225 Difference]: With dead ends: 21973 [2021-06-05 15:16:47,299 INFO L226 Difference]: Without dead ends: 21443 [2021-06-05 15:16:47,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:16:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-06-05 15:16:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-06-05 15:16:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-06-05 15:16:47,845 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-06-05 15:16:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:47,845 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-06-05 15:16:47,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-06-05 15:16:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:47,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:47,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:48,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:48,094 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-06-05 15:16:48,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:48,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459473102] [2021-06-05 15:16:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:48,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:48,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459473102] [2021-06-05 15:16:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459473102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453934257] [2021-06-05 15:16:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:48,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:16:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:48,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453934257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:48,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:16:48,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940612447] [2021-06-05 15:16:48,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:16:48,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:48,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:16:48,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:48,289 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:48,959 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-06-05 15:16:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:16:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:48,995 INFO L225 Difference]: With dead ends: 15939 [2021-06-05 15:16:48,995 INFO L226 Difference]: Without dead ends: 15563 [2021-06-05 15:16:48,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:16:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-06-05 15:16:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-06-05 15:16:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-06-05 15:16:49,398 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-06-05 15:16:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:49,398 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-06-05 15:16:49,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-06-05 15:16:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:16:49,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:49,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:49,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:49,637 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-06-05 15:16:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:49,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560093399] [2021-06-05 15:16:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:49,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560093399] [2021-06-05 15:16:49,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560093399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586111829] [2021-06-05 15:16:49,680 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:49,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:16:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:49,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586111829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:49,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:49,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 15:16:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127813274] [2021-06-05 15:16:49,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:16:49,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:49,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:16:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:16:49,808 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 15:16:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:50,156 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-06-05 15:16:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:16:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 35 [2021-06-05 15:16:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:50,201 INFO L225 Difference]: With dead ends: 17650 [2021-06-05 15:16:50,202 INFO L226 Difference]: Without dead ends: 17578 [2021-06-05 15:16:50,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-06-05 15:16:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-06-05 15:16:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-06-05 15:16:50,605 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-06-05 15:16:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:50,606 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-06-05 15:16:50,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 15:16:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-06-05 15:16:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:16:50,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:50,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:50,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:16:50,863 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-06-05 15:16:50,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:50,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471199266] [2021-06-05 15:16:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:16:50,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471199266] [2021-06-05 15:16:50,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471199266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209507198] [2021-06-05 15:16:50,901 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:50,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:50,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:16:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209507198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:51,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:51,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:16:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506816741] [2021-06-05 15:16:51,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:16:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:16:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:16:51,160 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 15:16:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:51,857 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-06-05 15:16:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:16:51,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 37 [2021-06-05 15:16:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:52,003 INFO L225 Difference]: With dead ends: 47667 [2021-06-05 15:16:52,003 INFO L226 Difference]: Without dead ends: 46072 [2021-06-05 15:16:52,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:16:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-06-05 15:16:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-06-05 15:16:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-06-05 15:16:53,312 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-06-05 15:16:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:53,312 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-06-05 15:16:53,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 15:16:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-06-05 15:16:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:16:53,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:53,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:53,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:53,580 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-06-05 15:16:53,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:53,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009656775] [2021-06-05 15:16:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:53,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009656775] [2021-06-05 15:16:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009656775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470086596] [2021-06-05 15:16:53,629 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:53,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:16:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:16:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:53,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470086596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:53,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:53,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 15:16:53,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328731468] [2021-06-05 15:16:53,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:16:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:16:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:53,763 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:54,414 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-06-05 15:16:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:16:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 15:16:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:54,543 INFO L225 Difference]: With dead ends: 41877 [2021-06-05 15:16:54,544 INFO L226 Difference]: Without dead ends: 41385 [2021-06-05 15:16:54,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-06-05 15:16:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-06-05 15:16:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-06-05 15:16:55,440 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-06-05 15:16:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:55,440 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-06-05 15:16:55,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-06-05 15:16:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:16:55,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:55,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:55,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:16:55,721 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-06-05 15:16:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:55,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169398114] [2021-06-05 15:16:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:55,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:55,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169398114] [2021-06-05 15:16:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169398114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:55,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419592779] [2021-06-05 15:16:55,769 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:16:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419592779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:56,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:56,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 15:16:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101073989] [2021-06-05 15:16:56,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:16:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:16:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:16:56,126 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:56,684 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-06-05 15:16:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:16:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 15:16:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:56,867 INFO L225 Difference]: With dead ends: 55329 [2021-06-05 15:16:56,867 INFO L226 Difference]: Without dead ends: 54965 [2021-06-05 15:16:56,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-06-05 15:16:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-06-05 15:16:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-06-05 15:16:58,159 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-06-05 15:16:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:58,159 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-06-05 15:16:58,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-06-05 15:16:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:16:58,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:58,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:58,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:58,440 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-06-05 15:16:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:58,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676029972] [2021-06-05 15:16:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:16:58,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:58,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676029972] [2021-06-05 15:16:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676029972] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:16:58,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:16:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:16:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413366635] [2021-06-05 15:16:58,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:16:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:16:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:16:58,457 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:58,972 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-06-05 15:16:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:16:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:16:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:59,159 INFO L225 Difference]: With dead ends: 36224 [2021-06-05 15:16:59,159 INFO L226 Difference]: Without dead ends: 36156 [2021-06-05 15:16:59,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:16:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-06-05 15:17:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-06-05 15:17:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-06-05 15:17:00,372 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-06-05 15:17:00,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:00,372 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-06-05 15:17:00,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-06-05 15:17:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:17:00,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:00,458 INFO L521 BasicCegarLoop]: trace histogram [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 15:17:00,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 15:17:00,459 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-06-05 15:17:00,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:00,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526703085] [2021-06-05 15:17:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:17:00,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526703085] [2021-06-05 15:17:00,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526703085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45495381] [2021-06-05 15:17:00,474 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:00,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:17:00,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:17:00,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:17:00,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45495381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:00,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:00,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-06-05 15:17:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099077494] [2021-06-05 15:17:00,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:17:00,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:17:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:17:00,642 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:01,127 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-06-05 15:17:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:17:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:17:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:01,655 INFO L225 Difference]: With dead ends: 51586 [2021-06-05 15:17:01,655 INFO L226 Difference]: Without dead ends: 50003 [2021-06-05 15:17:01,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:17:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-06-05 15:17:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-06-05 15:17:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-06-05 15:17:02,789 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-06-05 15:17:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:02,789 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-06-05 15:17:02,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-06-05 15:17:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:17:02,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:02,878 INFO L521 BasicCegarLoop]: trace histogram [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 15:17:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:17:03,078 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-06-05 15:17:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493495116] [2021-06-05 15:17:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:03,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:03,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493495116] [2021-06-05 15:17:03,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493495116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:03,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742138032] [2021-06-05 15:17:03,132 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:03,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:03,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:03,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:17:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742138032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:03,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:03,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:17:03,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661777017] [2021-06-05 15:17:03,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:17:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:17:03,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:17:03,285 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:04,305 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-06-05 15:17:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:17:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:17:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:04,538 INFO L225 Difference]: With dead ends: 63166 [2021-06-05 15:17:04,538 INFO L226 Difference]: Without dead ends: 63106 [2021-06-05 15:17:04,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:17:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-06-05 15:17:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-06-05 15:17:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-06-05 15:17:05,940 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-06-05 15:17:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:05,940 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-06-05 15:17:05,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-06-05 15:17:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:06,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:06,034 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:06,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:17:06,237 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-06-05 15:17:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:06,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214628677] [2021-06-05 15:17:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:17:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214628677] [2021-06-05 15:17:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214628677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079441568] [2021-06-05 15:17:06,311 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:06,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:17:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:17:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:17:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079441568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:06,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:06,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:17:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521780445] [2021-06-05 15:17:06,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:17:06,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:17:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:17:06,458 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:07,238 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-06-05 15:17:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:17:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:07,406 INFO L225 Difference]: With dead ends: 49744 [2021-06-05 15:17:07,406 INFO L226 Difference]: Without dead ends: 49407 [2021-06-05 15:17:07,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:17:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-06-05 15:17:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-06-05 15:17:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-06-05 15:17:08,641 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-06-05 15:17:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:08,641 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-06-05 15:17:08,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-06-05 15:17:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:08,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:08,740 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:08,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:17:08,945 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-06-05 15:17:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:08,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140910555] [2021-06-05 15:17:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:09,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:09,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140910555] [2021-06-05 15:17:09,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140910555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:09,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921483657] [2021-06-05 15:17:09,001 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:09,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:17:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:17:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921483657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 15:17:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302659396] [2021-06-05 15:17:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:17:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:17:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:17:09,147 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:09,983 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-06-05 15:17:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:17:09,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:10,195 INFO L225 Difference]: With dead ends: 60825 [2021-06-05 15:17:10,195 INFO L226 Difference]: Without dead ends: 59259 [2021-06-05 15:17:10,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:17:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-06-05 15:17:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-06-05 15:17:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-06-05 15:17:11,723 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-06-05 15:17:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:11,723 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-06-05 15:17:11,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-06-05 15:17:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:11,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:11,847 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:12,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:17:12,047 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-06-05 15:17:12,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:12,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926130230] [2021-06-05 15:17:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:12,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926130230] [2021-06-05 15:17:12,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926130230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71423052] [2021-06-05 15:17:12,107 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:17:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:17:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71423052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:12,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:12,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:17:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405000251] [2021-06-05 15:17:12,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:17:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:17:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:17:12,293 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:13,185 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-06-05 15:17:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:17:13,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:13,399 INFO L225 Difference]: With dead ends: 64976 [2021-06-05 15:17:13,400 INFO L226 Difference]: Without dead ends: 64453 [2021-06-05 15:17:13,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:17:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-06-05 15:17:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-06-05 15:17:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-06-05 15:17:15,002 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-06-05 15:17:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:15,002 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-06-05 15:17:15,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-06-05 15:17:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:15,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:15,593 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:15,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:15,813 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-06-05 15:17:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:15,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858025662] [2021-06-05 15:17:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:15,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858025662] [2021-06-05 15:17:15,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858025662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247978649] [2021-06-05 15:17:15,879 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:15,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:15,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:17:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:17:16,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247978649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:16,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:16,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:17:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750698048] [2021-06-05 15:17:16,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:17:16,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:17:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:16,031 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:16,736 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-06-05 15:17:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:17:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:17,063 INFO L225 Difference]: With dead ends: 93655 [2021-06-05 15:17:17,063 INFO L226 Difference]: Without dead ends: 91110 [2021-06-05 15:17:17,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-06-05 15:17:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-06-05 15:17:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-06-05 15:17:19,708 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-06-05 15:17:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:19,709 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-06-05 15:17:19,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-06-05 15:17:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:19,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:19,884 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:20,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:20,097 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-06-05 15:17:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:20,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544746329] [2021-06-05 15:17:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:20,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544746329] [2021-06-05 15:17:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544746329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707043158] [2021-06-05 15:17:20,159 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:20,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:17:20,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:20,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:17:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:20,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707043158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:20,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:20,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 15:17:20,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581120959] [2021-06-05 15:17:20,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:17:20,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:20,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:17:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:17:20,818 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:22,762 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-06-05 15:17:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:17:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:23,460 INFO L225 Difference]: With dead ends: 163014 [2021-06-05 15:17:23,460 INFO L226 Difference]: Without dead ends: 159428 [2021-06-05 15:17:23,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:17:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-06-05 15:17:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-06-05 15:17:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-06-05 15:17:28,201 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-06-05 15:17:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:28,201 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-06-05 15:17:28,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-06-05 15:17:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:28,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:28,506 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:28,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 15:17:28,721 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-06-05 15:17:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:28,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201686585] [2021-06-05 15:17:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:28,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:28,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201686585] [2021-06-05 15:17:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201686585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:28,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816019983] [2021-06-05 15:17:28,782 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:28,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:17:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:29,573 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 15:17:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:17:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816019983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:29,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:29,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:17:29,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148048948] [2021-06-05 15:17:29,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:17:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:17:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:29,628 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:30,772 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-06-05 15:17:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:17:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:31,959 INFO L225 Difference]: With dead ends: 156598 [2021-06-05 15:17:31,959 INFO L226 Difference]: Without dead ends: 156198 [2021-06-05 15:17:31,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-06-05 15:17:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-06-05 15:17:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-06-05 15:17:37,048 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-06-05 15:17:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:37,048 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-06-05 15:17:37,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-06-05 15:17:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:37,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:37,361 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:37,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:37,565 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-06-05 15:17:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:37,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273919180] [2021-06-05 15:17:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:37,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:37,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273919180] [2021-06-05 15:17:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273919180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:37,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428810333] [2021-06-05 15:17:37,628 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:37,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:17:37,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:17:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:17:37,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428810333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:37,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:37,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 15:17:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214652248] [2021-06-05 15:17:37,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:17:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:17:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:17:37,801 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:39,602 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-06-05 15:17:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:17:39,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:40,248 INFO L225 Difference]: With dead ends: 166888 [2021-06-05 15:17:40,248 INFO L226 Difference]: Without dead ends: 163861 [2021-06-05 15:17:40,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:17:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-06-05 15:17:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-06-05 15:17:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-06-05 15:17:44,527 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-06-05 15:17:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:44,527 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-06-05 15:17:44,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-06-05 15:17:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:44,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:44,765 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:44,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:17:44,966 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-06-05 15:17:44,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:44,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355312895] [2021-06-05 15:17:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:45,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:45,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355312895] [2021-06-05 15:17:45,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355312895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:45,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345789384] [2021-06-05 15:17:45,021 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:45,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:17:45,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:17:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:45,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345789384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:45,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:45,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:17:45,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909029115] [2021-06-05 15:17:45,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:17:45,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:17:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:17:45,183 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:46,816 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-06-05 15:17:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:17:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:47,251 INFO L225 Difference]: With dead ends: 118313 [2021-06-05 15:17:47,251 INFO L226 Difference]: Without dead ends: 118079 [2021-06-05 15:17:47,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-06-05 15:17:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-06-05 15:17:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-06-05 15:17:50,488 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-06-05 15:17:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:50,488 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-06-05 15:17:50,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-06-05 15:17:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:51,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:51,585 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:51,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:17:51,813 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-06-05 15:17:51,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:51,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541229130] [2021-06-05 15:17:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:51,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:51,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541229130] [2021-06-05 15:17:51,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541229130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:51,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921979512] [2021-06-05 15:17:51,879 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:17:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921979512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:52,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:52,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 15:17:52,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271381972] [2021-06-05 15:17:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:17:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:17:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:52,090 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:52,929 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-06-05 15:17:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:17:52,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:17:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:54,538 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 15:17:54,538 INFO L226 Difference]: Without dead ends: 130644 [2021-06-05 15:17:54,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:17:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-06-05 15:17:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-06-05 15:17:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-06-05 15:17:58,765 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-06-05 15:17:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:58,765 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-06-05 15:17:58,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-06-05 15:17:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:17:59,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:59,059 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:17:59,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:17:59,260 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-06-05 15:17:59,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:59,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40333594] [2021-06-05 15:17:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:59,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40333594] [2021-06-05 15:17:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40333594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203272173] [2021-06-05 15:17:59,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:59,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:17:59,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203272173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:59,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:59,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:17:59,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978958897] [2021-06-05 15:17:59,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:17:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:17:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:17:59,503 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:00,992 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-06-05 15:18:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:18:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:18:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:01,585 INFO L225 Difference]: With dead ends: 140482 [2021-06-05 15:18:01,586 INFO L226 Difference]: Without dead ends: 139756 [2021-06-05 15:18:01,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:18:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-06-05 15:18:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-06-05 15:18:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-06-05 15:18:05,813 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-06-05 15:18:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-06-05 15:18:05,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-06-05 15:18:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:06,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:06,130 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:18:06,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:18:06,330 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-06-05 15:18:06,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:06,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122436881] [2021-06-05 15:18:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:06,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:06,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122436881] [2021-06-05 15:18:06,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122436881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:06,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153717943] [2021-06-05 15:18:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:06,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:18:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:18:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:06,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153717943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:06,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:06,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 15:18:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704285622] [2021-06-05 15:18:06,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:18:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:18:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:18:06,585 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:08,503 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-06-05 15:18:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:18:08,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:18:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:09,236 INFO L225 Difference]: With dead ends: 186146 [2021-06-05 15:18:09,237 INFO L226 Difference]: Without dead ends: 183395 [2021-06-05 15:18:09,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:18:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-06-05 15:18:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-06-05 15:18:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-06-05 15:18:15,246 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-06-05 15:18:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:15,246 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-06-05 15:18:15,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-06-05 15:18:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:15,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:15,617 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:18:15,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:18:15,817 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-06-05 15:18:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:15,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791513842] [2021-06-05 15:18:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:15,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:15,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791513842] [2021-06-05 15:18:15,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791513842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:15,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557934933] [2021-06-05 15:18:15,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:15,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:15,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:18:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:16,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557934933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:16,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:16,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 15:18:16,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278625775] [2021-06-05 15:18:16,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:18:16,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:18:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:18:16,039 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:19,515 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-06-05 15:18:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:18:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:18:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:21,775 INFO L225 Difference]: With dead ends: 327820 [2021-06-05 15:18:21,775 INFO L226 Difference]: Without dead ends: 324633 [2021-06-05 15:18:21,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:18:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-06-05 15:18:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-06-05 15:18:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-06-05 15:18:32,534 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-06-05 15:18:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:32,534 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-06-05 15:18:32,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-06-05 15:18:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:33,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:33,144 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:18:33,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:33,345 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:33,346 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-06-05 15:18:33,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:33,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510523677] [2021-06-05 15:18:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:33,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510523677] [2021-06-05 15:18:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510523677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083125677] [2021-06-05 15:18:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:33,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:18:33,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:18:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:34,194 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 15:18:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:34,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083125677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:34,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:34,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 15:18:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142022940] [2021-06-05 15:18:34,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:18:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:18:34,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:18:34,292 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:36,836 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-06-05 15:18:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:18:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:18:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:38,956 INFO L225 Difference]: With dead ends: 283707 [2021-06-05 15:18:38,956 INFO L226 Difference]: Without dead ends: 283245 [2021-06-05 15:18:38,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:18:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-06-05 15:18:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-06-05 15:18:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-06-05 15:18:47,830 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-06-05 15:18:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-06-05 15:18:47,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-06-05 15:18:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:48,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:48,399 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:18:48,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:18:48,600 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-06-05 15:18:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:48,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805756071] [2021-06-05 15:18:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:48,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:48,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805756071] [2021-06-05 15:18:48,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805756071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:48,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037947637] [2021-06-05 15:18:48,684 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:48,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:18:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:18:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:48,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037947637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:48,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:48,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:18:48,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241533180] [2021-06-05 15:18:48,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:18:48,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:18:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:18:48,873 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:52,117 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-06-05 15:18:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:18:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:18:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:54,686 INFO L225 Difference]: With dead ends: 263379 [2021-06-05 15:18:54,686 INFO L226 Difference]: Without dead ends: 260502 [2021-06-05 15:18:54,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:18:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-06-05 15:18:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-06-05 15:18:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-06-05 15:19:00,427 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-06-05 15:19:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:00,427 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-06-05 15:19:00,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-06-05 15:19:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:00,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:00,719 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:19:00,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:19:00,919 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-06-05 15:19:00,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:00,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728823790] [2021-06-05 15:19:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:01,662 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 15:19:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:01,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728823790] [2021-06-05 15:19:01,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728823790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365779851] [2021-06-05 15:19:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:01,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365779851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:01,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:01,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 15:19:01,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022856275] [2021-06-05 15:19:01,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:19:01,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:19:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:01,912 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:03,873 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-06-05 15:19:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:19:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:19:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:04,823 INFO L225 Difference]: With dead ends: 223049 [2021-06-05 15:19:04,824 INFO L226 Difference]: Without dead ends: 220377 [2021-06-05 15:19:04,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:19:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-06-05 15:19:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-06-05 15:19:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-06-05 15:19:11,483 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-06-05 15:19:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:11,483 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-06-05 15:19:11,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-06-05 15:19:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:11,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:11,878 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:19:12,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:12,079 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-06-05 15:19:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:12,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720359464] [2021-06-05 15:19:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:12,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720359464] [2021-06-05 15:19:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720359464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267845885] [2021-06-05 15:19:12,157 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:12,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:12,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:12,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267845885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:12,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:12,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 15:19:12,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435340761] [2021-06-05 15:19:12,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:19:12,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:12,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:19:12,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:12,314 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:14,996 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-06-05 15:19:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:19:14,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:19:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:15,966 INFO L225 Difference]: With dead ends: 212915 [2021-06-05 15:19:15,967 INFO L226 Difference]: Without dead ends: 210423 [2021-06-05 15:19:15,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:19:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-06-05 15:19:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-06-05 15:19:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-06-05 15:19:23,259 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-06-05 15:19:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:23,259 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-06-05 15:19:23,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-06-05 15:19:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:24,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:24,635 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:19:24,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:19:24,836 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-06-05 15:19:24,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:24,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634375439] [2021-06-05 15:19:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:24,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634375439] [2021-06-05 15:19:24,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634375439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86272921] [2021-06-05 15:19:24,907 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:24,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:19:24,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86272921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:25,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 15:19:25,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295094955] [2021-06-05 15:19:25,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:19:25,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:25,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:19:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:19:25,098 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:29,250 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-06-05 15:19:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:19:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:19:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:32,046 INFO L225 Difference]: With dead ends: 397194 [2021-06-05 15:19:32,047 INFO L226 Difference]: Without dead ends: 393877 [2021-06-05 15:19:32,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:19:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-06-05 15:19:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-06-05 15:19:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-06-05 15:19:45,953 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-06-05 15:19:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:45,953 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-06-05 15:19:45,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-06-05 15:19:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:46,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:46,728 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:19:46,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:46,929 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-06-05 15:19:46,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:46,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140558161] [2021-06-05 15:19:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:46,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140558161] [2021-06-05 15:19:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140558161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041171464] [2021-06-05 15:19:46,998 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:47,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:47,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:47,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:19:47,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:47,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041171464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:47,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:47,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:19:47,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651383384] [2021-06-05 15:19:47,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:47,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:47,159 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:51,591 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-06-05 15:19:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:19:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:19:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:54,113 INFO L225 Difference]: With dead ends: 316931 [2021-06-05 15:19:54,113 INFO L226 Difference]: Without dead ends: 316481 [2021-06-05 15:19:54,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-06-05 15:20:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-06-05 15:20:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-06-05 15:20:03,871 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-06-05 15:20:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:03,871 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-06-05 15:20:03,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-06-05 15:20:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:20:04,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:04,511 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:20:04,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:20:04,711 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-06-05 15:20:04,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:04,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708488888] [2021-06-05 15:20:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:04,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708488888] [2021-06-05 15:20:04,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708488888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8067632] [2021-06-05 15:20:04,786 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:04,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:20:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:20:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:20:04,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8067632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:04,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:04,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:20:04,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744739344] [2021-06-05 15:20:04,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:20:04,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:04,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:20:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:20:04,950 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:08,675 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-06-05 15:20:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:20:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:20:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:11,025 INFO L225 Difference]: With dead ends: 351280 [2021-06-05 15:20:11,026 INFO L226 Difference]: Without dead ends: 347746 [2021-06-05 15:20:11,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:20:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-06-05 15:20:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-06-05 15:20:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-06-05 15:20:23,560 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-06-05 15:20:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:23,560 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-06-05 15:20:23,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-06-05 15:20:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:20:24,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:24,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:20:24,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 15:20:24,557 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-06-05 15:20:24,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:24,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512300740] [2021-06-05 15:20:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:20:24,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:24,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512300740] [2021-06-05 15:20:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512300740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:24,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386078145] [2021-06-05 15:20:24,619 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:24,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:20:24,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:20:24,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386078145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:24,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:24,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:20:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217986448] [2021-06-05 15:20:24,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:20:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:24,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:20:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:20:24,780 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:31,162 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-06-05 15:20:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:20:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:20:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:33,886 INFO L225 Difference]: With dead ends: 517007 [2021-06-05 15:20:33,886 INFO L226 Difference]: Without dead ends: 515961 [2021-06-05 15:20:33,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1064.0ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:20:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-06-05 15:20:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-06-05 15:20:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-06-05 15:20:46,491 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-06-05 15:20:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:46,491 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-06-05 15:20:46,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-06-05 15:20:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:20:47,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:47,728 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:20:47,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:20:47,941 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-06-05 15:20:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:47,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914818240] [2021-06-05 15:20:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:20:48,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:48,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914818240] [2021-06-05 15:20:48,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914818240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:48,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637676918] [2021-06-05 15:20:48,008 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:20:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:20:48,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637676918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:48,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:20:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748617425] [2021-06-05 15:20:48,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:20:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:20:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:20:48,163 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:54,761 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-06-05 15:20:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:20:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:20:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:58,911 INFO L225 Difference]: With dead ends: 490894 [2021-06-05 15:20:58,911 INFO L226 Difference]: Without dead ends: 487402 [2021-06-05 15:20:58,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:21:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-06-05 15:21:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-06-05 15:21:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-06-05 15:21:12,858 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-06-05 15:21:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:12,858 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-06-05 15:21:12,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-06-05 15:21:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:21:13,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:13,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:21:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:21:13,856 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-06-05 15:21:13,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:13,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441297832] [2021-06-05 15:21:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:21:13,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441297832] [2021-06-05 15:21:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441297832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581578556] [2021-06-05 15:21:13,898 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:13,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:21:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:21:14,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581578556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:14,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:14,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:21:14,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293860251] [2021-06-05 15:21:14,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:21:14,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:21:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:21:14,052 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:18,211 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-06-05 15:21:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:21:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:21:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:20,955 INFO L225 Difference]: With dead ends: 401083 [2021-06-05 15:21:20,955 INFO L226 Difference]: Without dead ends: 400185 [2021-06-05 15:21:20,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:21:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-06-05 15:21:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-06-05 15:21:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-06-05 15:21:28,293 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-06-05 15:21:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:28,293 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-06-05 15:21:28,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-06-05 15:21:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:21:29,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:29,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:21:29,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:29,401 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-06-05 15:21:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:29,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585975132] [2021-06-05 15:21:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:21:29,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:29,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585975132] [2021-06-05 15:21:29,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585975132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:29,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517941506] [2021-06-05 15:21:29,498 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:29,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:21:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:21:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517941506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:29,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:29,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:21:29,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016322360] [2021-06-05 15:21:29,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:21:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:21:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:21:29,693 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:34,922 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-06-05 15:21:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:21:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:21:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:36,682 INFO L225 Difference]: With dead ends: 359669 [2021-06-05 15:21:36,683 INFO L226 Difference]: Without dead ends: 358139 [2021-06-05 15:21:36,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:21:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-06-05 15:21:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-06-05 15:21:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-06-05 15:21:44,479 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-06-05 15:21:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:44,479 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-06-05 15:21:44,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-06-05 15:21:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:21:44,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:44,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:21:45,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:21:45,098 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:45,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-06-05 15:21:45,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:45,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239306248] [2021-06-05 15:21:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:21:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239306248] [2021-06-05 15:21:45,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239306248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635305493] [2021-06-05 15:21:45,139 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:45,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:21:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:21:45,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635305493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:45,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:45,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:21:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763084069] [2021-06-05 15:21:45,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:21:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:21:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:21:45,294 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:48,942 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-06-05 15:21:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:21:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:21:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:50,421 INFO L225 Difference]: With dead ends: 318028 [2021-06-05 15:21:50,421 INFO L226 Difference]: Without dead ends: 317616 [2021-06-05 15:21:50,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:21:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-06-05 15:21:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-06-05 15:21:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-06-05 15:21:57,455 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-06-05 15:21:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:57,455 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-06-05 15:21:57,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-06-05 15:21:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:21:58,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:58,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:21:59,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:59,046 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-06-05 15:21:59,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:59,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206253882] [2021-06-05 15:21:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:21:59,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:59,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206253882] [2021-06-05 15:21:59,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206253882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:59,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251391577] [2021-06-05 15:21:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:59,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:21:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:21:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:21:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251391577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:59,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:59,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 15:21:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297332658] [2021-06-05 15:21:59,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:21:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:21:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:21:59,257 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:05,756 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-06-05 15:22:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:22:05,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:22:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:09,554 INFO L225 Difference]: With dead ends: 593260 [2021-06-05 15:22:09,554 INFO L226 Difference]: Without dead ends: 584415 [2021-06-05 15:22:09,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:22:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-06-05 15:22:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-06-05 15:22:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-06-05 15:22:22,293 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-06-05 15:22:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-06-05 15:22:22,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-06-05 15:22:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:22:23,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:23,715 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:22:23,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:23,929 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-06-05 15:22:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:23,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247357819] [2021-06-05 15:22:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:22:23,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:23,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247357819] [2021-06-05 15:22:23,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247357819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:23,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946113324] [2021-06-05 15:22:23,955 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:24,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:22:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:22:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:22:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946113324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:24,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:24,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-05 15:22:24,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558253339] [2021-06-05 15:22:24,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:22:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:22:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:22:24,160 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:31,670 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-06-05 15:22:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 15:22:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:22:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:34,795 INFO L225 Difference]: With dead ends: 489163 [2021-06-05 15:22:34,795 INFO L226 Difference]: Without dead ends: 486417 [2021-06-05 15:22:34,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1306.6ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 15:22:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-06-05 15:22:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-06-05 15:22:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-06-05 15:22:46,230 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-06-05 15:22:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:46,231 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-06-05 15:22:46,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-06-05 15:22:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:22:46,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:46,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:22:47,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:22:47,162 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-06-05 15:22:47,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:47,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903304626] [2021-06-05 15:22:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:22:47,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903304626] [2021-06-05 15:22:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903304626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556664639] [2021-06-05 15:22:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:22:47,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:22:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556664639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:22:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499127237] [2021-06-05 15:22:47,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:22:47,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:22:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:22:47,369 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:50,936 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-06-05 15:22:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:22:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:22:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:53,130 INFO L225 Difference]: With dead ends: 345677 [2021-06-05 15:22:53,130 INFO L226 Difference]: Without dead ends: 344598 [2021-06-05 15:22:53,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:22:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-06-05 15:22:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-06-05 15:22:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-06-05 15:23:00,864 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-06-05 15:23:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:00,864 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-06-05 15:23:00,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-06-05 15:23:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:23:02,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:02,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:23:02,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:02,483 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:02,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-06-05 15:23:02,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:02,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992030500] [2021-06-05 15:23:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:23:02,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:02,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992030500] [2021-06-05 15:23:02,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992030500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:02,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517156714] [2021-06-05 15:23:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:02,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:23:02,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:23:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517156714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:02,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:02,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 15:23:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752543957] [2021-06-05 15:23:02,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:23:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:23:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:23:02,665 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:06,648 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-06-05 15:23:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:23:06,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:23:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:08,307 INFO L225 Difference]: With dead ends: 362878 [2021-06-05 15:23:08,308 INFO L226 Difference]: Without dead ends: 361792 [2021-06-05 15:23:08,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:23:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-06-05 15:23:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-06-05 15:23:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-06-05 15:23:19,500 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-06-05 15:23:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:19,500 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-06-05 15:23:19,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-06-05 15:23:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:23:21,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:21,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:23:21,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:23:21,249 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:21,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-06-05 15:23:21,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:21,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353199089] [2021-06-05 15:23:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:23:21,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353199089] [2021-06-05 15:23:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353199089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888216061] [2021-06-05 15:23:21,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:21,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:23:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:21,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:23:21,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:23:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888216061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 15:23:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638746648] [2021-06-05 15:23:21,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:23:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:23:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:23:21,544 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:30,760 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-06-05 15:23:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:23:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:23:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:34,446 INFO L225 Difference]: With dead ends: 557436 [2021-06-05 15:23:34,446 INFO L226 Difference]: Without dead ends: 555086 [2021-06-05 15:23:34,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1938.6ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 15:23:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-06-05 15:23:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-06-05 15:23:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-06-05 15:23:53,496 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-06-05 15:23:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:53,496 INFO L482 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-06-05 15:23:53,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-06-05 15:23:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:23:55,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:55,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:23:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:55,815 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-06-05 15:23:55,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:55,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421358508] [2021-06-05 15:23:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:23:55,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421358508] [2021-06-05 15:23:55,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421358508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842120197] [2021-06-05 15:23:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:55,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:23:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:23:56,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842120197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:56,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:56,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:23:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945708082] [2021-06-05 15:23:56,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:23:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:23:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:23:56,035 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:08,088 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-06-05 15:24:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:24:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:24:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:18,663 INFO L225 Difference]: With dead ends: 928977 [2021-06-05 15:24:18,664 INFO L226 Difference]: Without dead ends: 928257 [2021-06-05 15:24:18,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-06-05 15:24:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-06-05 15:24:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-06-05 15:24:51,506 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-06-05 15:24:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:51,506 INFO L482 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-06-05 15:24:51,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-06-05 15:24:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:24:55,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:55,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 15:24:55,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:24:55,639 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:55,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-06-05 15:24:55,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:55,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95087399] [2021-06-05 15:24:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:24:55,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95087399] [2021-06-05 15:24:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95087399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816127793] [2021-06-05 15:24:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:24:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:24:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:24:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816127793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:55,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:55,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 15:24:55,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774433043] [2021-06-05 15:24:55,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:24:55,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:55,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:24:55,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:24:55,886 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:15,436 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-06-05 15:25:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:25:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:25:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:28,636 INFO L225 Difference]: With dead ends: 1140384 [2021-06-05 15:25:28,636 INFO L226 Difference]: Without dead ends: 1137922 [2021-06-05 15:25:28,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:25:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. Received shutdown request... [2021-06-05 15:26:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137922 to 669469. Cannot interrupt operation gracefully because timeout expired. Forcing shutdown