/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:34:49,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:34:49,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:34:49,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:34:50,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:34:50,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:34:50,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:34:50,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:34:50,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:34:50,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:34:50,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:34:50,051 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:34:50,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:34:50,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:34:50,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:34:50,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:34:50,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:34:50,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:34:50,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:34:50,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:34:50,054 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:34:50,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:34:50,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:34:50,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:34:50,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:34:50,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:34:50,306 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:34:50,307 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:34:50,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-06-06 00:34:50,308 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-06-06 00:34:50,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:34:50,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:34:50,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:34:50,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:34:50,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:34:50,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:34:50,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:34:50,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:34:50,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:34:50,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/1) ... [2021-06-06 00:34:50,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:34:50,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:34:50,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:34:50,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:34:50,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (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 [2021-06-06 00:34:50,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:34:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:34:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:34:50,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:34:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:34:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:34:50,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:34:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:34:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:34:50,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:34:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:34:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:34:50,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-06 00:34:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-06 00:34:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-06 00:34:50,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:34:50,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:34:50,758 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:34:50,759 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:34:50 BoogieIcfgContainer [2021-06-06 00:34:50,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:34:50,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:34:50,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:34:50,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:34:50,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:34:50" (1/2) ... [2021-06-06 00:34:50,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc43cee and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:34:50, skipping insertion in model container [2021-06-06 00:34:50,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:34:50" (2/2) ... [2021-06-06 00:34:50,764 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-06-06 00:34:50,768 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:34:50,768 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:34:50,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:34:50,768 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:34:50,816 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-06 00:34:50,828 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-06 00:34:50,840 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:34:50,840 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:34:50,840 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:34:50,840 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:34:50,840 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:34:50,840 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:34:50,840 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:34:50,840 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:34:50,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-06 00:34:50,913 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:34:50,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:50,941 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:50,941 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash -163076712, now seen corresponding path program 1 times [2021-06-06 00:34:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:50,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47249067] [2021-06-06 00:34:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:51,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47249067] [2021-06-06 00:34:51,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47249067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:51,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:51,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:34:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614587437] [2021-06-06 00:34:51,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:34:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:34:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:34:51,088 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:51,129 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-06-06 00:34:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:34:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:34:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:51,142 INFO L225 Difference]: With dead ends: 856 [2021-06-06 00:34:51,142 INFO L226 Difference]: Without dead ends: 731 [2021-06-06 00:34:51,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:34:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-06 00:34:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-06-06 00:34:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-06-06 00:34:51,212 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-06-06 00:34:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:51,213 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-06-06 00:34:51,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-06-06 00:34:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:51,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:51,218 INFO L554 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] [2021-06-06 00:34:51,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:34:51,218 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1142310058, now seen corresponding path program 1 times [2021-06-06 00:34:51,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:51,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918806471] [2021-06-06 00:34:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:51,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918806471] [2021-06-06 00:34:51,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918806471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:51,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114522191] [2021-06-06 00:34:51,288 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 [2021-06-06 00:34:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:34:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114522191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:51,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-06 00:34:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178425294] [2021-06-06 00:34:51,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:34:51,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:34:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:34:51,419 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:51,511 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-06-06 00:34:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:51,520 INFO L225 Difference]: With dead ends: 1527 [2021-06-06 00:34:51,520 INFO L226 Difference]: Without dead ends: 1527 [2021-06-06 00:34:51,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:34:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-06 00:34:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-06-06 00:34:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-06-06 00:34:51,564 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-06-06 00:34:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:51,564 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-06-06 00:34:51,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-06-06 00:34:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:51,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:51,571 INFO L554 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] [2021-06-06 00:34:51,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-06 00:34:51,787 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1324630694, now seen corresponding path program 1 times [2021-06-06 00:34:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576156818] [2021-06-06 00:34:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:51,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576156818] [2021-06-06 00:34:51,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576156818] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:51,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:51,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:34:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571600600] [2021-06-06 00:34:51,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:34:51,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:34:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:51,843 INFO L87 Difference]: Start difference. First operand 837 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:51,902 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-06-06 00:34:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:51,907 INFO L225 Difference]: With dead ends: 1186 [2021-06-06 00:34:51,907 INFO L226 Difference]: Without dead ends: 1076 [2021-06-06 00:34:51,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:34:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-06 00:34:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-06-06 00:34:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-06-06 00:34:51,929 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-06-06 00:34:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:51,929 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-06-06 00:34:51,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-06-06 00:34:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:51,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:51,931 INFO L554 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] [2021-06-06 00:34:51,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:34:51,931 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1971805834, now seen corresponding path program 2 times [2021-06-06 00:34:51,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:51,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907720080] [2021-06-06 00:34:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:52,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907720080] [2021-06-06 00:34:52,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907720080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:52,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:52,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:34:52,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384981785] [2021-06-06 00:34:52,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:34:52,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:34:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:34:52,012 INFO L87 Difference]: Start difference. First operand 805 states and 3054 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,043 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-06-06 00:34:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:34:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,048 INFO L225 Difference]: With dead ends: 1022 [2021-06-06 00:34:52,048 INFO L226 Difference]: Without dead ends: 1022 [2021-06-06 00:34:52,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-06-06 00:34:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-06-06 00:34:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-06-06 00:34:52,066 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-06-06 00:34:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,066 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-06-06 00:34:52,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-06-06 00:34:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:52,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,068 INFO L554 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] [2021-06-06 00:34:52,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-06 00:34:52,068 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1776150594, now seen corresponding path program 2 times [2021-06-06 00:34:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767801548] [2021-06-06 00:34:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767801548] [2021-06-06 00:34:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767801548] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:52,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:52,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:34:52,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880451265] [2021-06-06 00:34:52,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:34:52,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:34:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:52,105 INFO L87 Difference]: Start difference. First operand 847 states and 3174 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,160 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-06-06 00:34:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,166 INFO L225 Difference]: With dead ends: 1324 [2021-06-06 00:34:52,166 INFO L226 Difference]: Without dead ends: 1288 [2021-06-06 00:34:52,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:34:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-06 00:34:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-06-06 00:34:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-06-06 00:34:52,188 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-06-06 00:34:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,188 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-06-06 00:34:52,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-06-06 00:34:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:52,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,190 INFO L554 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] [2021-06-06 00:34:52,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-06 00:34:52,191 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1017455134, now seen corresponding path program 3 times [2021-06-06 00:34:52,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199753442] [2021-06-06 00:34:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:52,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199753442] [2021-06-06 00:34:52,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199753442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:52,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:52,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:34:52,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391252444] [2021-06-06 00:34:52,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:34:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:34:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:34:52,232 INFO L87 Difference]: Start difference. First operand 893 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,274 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-06-06 00:34:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:34:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,281 INFO L225 Difference]: With dead ends: 1414 [2021-06-06 00:34:52,281 INFO L226 Difference]: Without dead ends: 1392 [2021-06-06 00:34:52,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-06-06 00:34:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-06-06 00:34:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-06-06 00:34:52,312 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-06-06 00:34:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,312 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-06-06 00:34:52,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-06-06 00:34:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:34:52,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,316 INFO L554 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] [2021-06-06 00:34:52,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-06 00:34:52,316 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1407416862, now seen corresponding path program 4 times [2021-06-06 00:34:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423346488] [2021-06-06 00:34:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:52,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423346488] [2021-06-06 00:34:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423346488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:34:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417259802] [2021-06-06 00:34:52,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:34:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:34:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:52,379 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,410 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-06-06 00:34:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:34:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:34:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,417 INFO L225 Difference]: With dead ends: 1451 [2021-06-06 00:34:52,417 INFO L226 Difference]: Without dead ends: 1451 [2021-06-06 00:34:52,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-06 00:34:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-06-06 00:34:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-06-06 00:34:52,446 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-06-06 00:34:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,446 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-06-06 00:34:52,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-06-06 00:34:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:34:52,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,449 INFO L554 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] [2021-06-06 00:34:52,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-06 00:34:52,450 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash 832198006, now seen corresponding path program 1 times [2021-06-06 00:34:52,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550222163] [2021-06-06 00:34:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:52,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550222163] [2021-06-06 00:34:52,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550222163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:52,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462748428] [2021-06-06 00:34:52,533 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 [2021-06-06 00:34:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:34:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462748428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:52,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-06 00:34:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665998782] [2021-06-06 00:34:52,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:34:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:34:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:34:52,642 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,716 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-06-06 00:34:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:34:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,723 INFO L225 Difference]: With dead ends: 1625 [2021-06-06 00:34:52,723 INFO L226 Difference]: Without dead ends: 1546 [2021-06-06 00:34:52,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:34:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-06 00:34:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-06-06 00:34:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-06-06 00:34:52,764 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-06-06 00:34:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,764 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-06-06 00:34:52,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-06-06 00:34:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:34:52,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,767 INFO L554 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] [2021-06-06 00:34:52,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:52,981 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash 80621012, now seen corresponding path program 2 times [2021-06-06 00:34:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502353693] [2021-06-06 00:34:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:53,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:53,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502353693] [2021-06-06 00:34:53,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502353693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:53,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:53,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:34:53,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563556206] [2021-06-06 00:34:53,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:34:53,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:53,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:34:53,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:34:53,010 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) 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) [2021-06-06 00:34:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:53,031 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-06-06 00:34:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:34:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) 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 [2021-06-06 00:34:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:53,037 INFO L225 Difference]: With dead ends: 1338 [2021-06-06 00:34:53,037 INFO L226 Difference]: Without dead ends: 1338 [2021-06-06 00:34:53,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:34:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-06-06 00:34:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-06-06 00:34:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-06-06 00:34:53,061 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-06-06 00:34:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:53,061 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-06-06 00:34:53,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) 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) [2021-06-06 00:34:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-06-06 00:34:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:34:53,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:53,063 INFO L554 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] [2021-06-06 00:34:53,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-06 00:34:53,063 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1880308832, now seen corresponding path program 1 times [2021-06-06 00:34:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:53,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173102631] [2021-06-06 00:34:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:53,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173102631] [2021-06-06 00:34:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173102631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131608286] [2021-06-06 00:34:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:34:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:53,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131608286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:53,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:53,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-06 00:34:53,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45749029] [2021-06-06 00:34:53,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:34:53,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:34:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:34:53,206 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:53,256 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-06-06 00:34:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:34:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:53,275 INFO L225 Difference]: With dead ends: 1711 [2021-06-06 00:34:53,275 INFO L226 Difference]: Without dead ends: 1659 [2021-06-06 00:34:53,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:34:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-06 00:34:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-06-06 00:34:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-06-06 00:34:53,298 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-06-06 00:34:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:53,298 INFO L482 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-06-06 00:34:53,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-06-06 00:34:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:34:53,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:53,301 INFO L554 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] [2021-06-06 00:34:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:34:53,513 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1955058084, now seen corresponding path program 3 times [2021-06-06 00:34:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302764333] [2021-06-06 00:34:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:53,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:53,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302764333] [2021-06-06 00:34:53,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302764333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:34:53,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:34:53,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:34:53,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770740432] [2021-06-06 00:34:53,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:34:53,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:53,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:34:53,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:34:53,531 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) 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) [2021-06-06 00:34:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:53,558 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-06-06 00:34:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:34:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) 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 [2021-06-06 00:34:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:53,560 INFO L225 Difference]: With dead ends: 1111 [2021-06-06 00:34:53,560 INFO L226 Difference]: Without dead ends: 946 [2021-06-06 00:34:53,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-06 00:34:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-06-06 00:34:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-06-06 00:34:53,575 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-06-06 00:34:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:53,575 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-06-06 00:34:53,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) 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) [2021-06-06 00:34:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-06-06 00:34:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:34:53,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:53,577 INFO L554 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] [2021-06-06 00:34:53,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-06 00:34:53,577 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1889596984, now seen corresponding path program 1 times [2021-06-06 00:34:53,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:53,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639681792] [2021-06-06 00:34:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:53,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639681792] [2021-06-06 00:34:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639681792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439485456] [2021-06-06 00:34:53,599 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) [2021-06-06 00:34:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:34:53,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:53,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439485456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:53,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:53,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-06 00:34:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759681092] [2021-06-06 00:34:53,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:34:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:34:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:34:53,685 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:53,727 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-06-06 00:34:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:34:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:53,734 INFO L225 Difference]: With dead ends: 2765 [2021-06-06 00:34:53,734 INFO L226 Difference]: Without dead ends: 2631 [2021-06-06 00:34:53,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:34:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-06 00:34:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-06-06 00:34:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-06-06 00:34:53,775 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-06-06 00:34:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:53,776 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-06-06 00:34:53,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-06-06 00:34:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:34:53,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:53,780 INFO L554 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] [2021-06-06 00:34:53,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:53,995 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 444548470, now seen corresponding path program 2 times [2021-06-06 00:34:53,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:53,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920422191] [2021-06-06 00:34:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:34:54,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920422191] [2021-06-06 00:34:54,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920422191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870153317] [2021-06-06 00:34:54,043 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 [2021-06-06 00:34:54,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:34:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-06 00:34:54,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870153317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:54,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:54,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-06 00:34:54,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779924733] [2021-06-06 00:34:54,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:34:54,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:54,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:34:54,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:34:54,171 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:54,265 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-06-06 00:34:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:34:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:54,271 INFO L225 Difference]: With dead ends: 2660 [2021-06-06 00:34:54,272 INFO L226 Difference]: Without dead ends: 2660 [2021-06-06 00:34:54,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:34:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-06-06 00:34:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-06-06 00:34:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-06-06 00:34:54,315 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-06-06 00:34:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:54,316 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-06-06 00:34:54,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-06-06 00:34:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:34:54,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:54,320 INFO L554 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] [2021-06-06 00:34:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-06 00:34:54,533 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1645018294, now seen corresponding path program 1 times [2021-06-06 00:34:54,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:54,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108855898] [2021-06-06 00:34:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:34:54,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:54,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108855898] [2021-06-06 00:34:54,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108855898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:54,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031292888] [2021-06-06 00:34:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:34:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:54,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031292888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:54,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:54,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-06 00:34:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224208119] [2021-06-06 00:34:54,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:34:54,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:34:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:34:54,690 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:54,748 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-06-06 00:34:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:34:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:34:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:54,754 INFO L225 Difference]: With dead ends: 2794 [2021-06-06 00:34:54,754 INFO L226 Difference]: Without dead ends: 2640 [2021-06-06 00:34:54,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:34:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-06 00:34:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-06-06 00:34:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-06-06 00:34:54,791 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-06-06 00:34:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:54,791 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-06-06 00:34:54,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-06-06 00:34:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:34:54,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:54,795 INFO L554 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] [2021-06-06 00:34:55,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:55,016 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1661082892, now seen corresponding path program 2 times [2021-06-06 00:34:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:55,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803727407] [2021-06-06 00:34:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:55,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803727407] [2021-06-06 00:34:55,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803727407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174920720] [2021-06-06 00:34:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:55,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:55,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:34:55,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:55,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174920720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:55,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:55,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-06 00:34:55,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455023388] [2021-06-06 00:34:55,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:34:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:34:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:34:55,174 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:55,275 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-06-06 00:34:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:34:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:34:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:55,287 INFO L225 Difference]: With dead ends: 5257 [2021-06-06 00:34:55,287 INFO L226 Difference]: Without dead ends: 4937 [2021-06-06 00:34:55,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:34:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-06-06 00:34:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-06-06 00:34:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-06-06 00:34:55,353 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-06-06 00:34:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:55,353 INFO L482 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-06-06 00:34:55,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-06-06 00:34:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:34:55,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:55,358 INFO L554 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] [2021-06-06 00:34:55,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:34:55,565 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1512383048, now seen corresponding path program 3 times [2021-06-06 00:34:55,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:55,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030616020] [2021-06-06 00:34:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:34:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030616020] [2021-06-06 00:34:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030616020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491190848] [2021-06-06 00:34:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:55,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:34:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:34:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:34:55,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491190848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:55,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:55,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-06 00:34:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482566042] [2021-06-06 00:34:55,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:34:55,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:34:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:34:55,743 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:56,318 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-06-06 00:34:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:34:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:34:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:56,346 INFO L225 Difference]: With dead ends: 11182 [2021-06-06 00:34:56,346 INFO L226 Difference]: Without dead ends: 10794 [2021-06-06 00:34:56,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:34:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-06-06 00:34:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-06-06 00:34:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-06-06 00:34:56,485 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-06-06 00:34:56,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:56,486 INFO L482 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-06-06 00:34:56,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-06-06 00:34:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:34:56,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:56,496 INFO L554 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] [2021-06-06 00:34:56,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-06 00:34:56,714 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1087882488, now seen corresponding path program 4 times [2021-06-06 00:34:56,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:56,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096147655] [2021-06-06 00:34:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:56,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096147655] [2021-06-06 00:34:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096147655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:56,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426778954] [2021-06-06 00:34:56,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:56,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:34:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:56,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426778954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:56,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:56,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-06 00:34:56,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785882865] [2021-06-06 00:34:56,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:34:56,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:34:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:34:56,896 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:57,096 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-06-06 00:34:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:34:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:34:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:57,139 INFO L225 Difference]: With dead ends: 14551 [2021-06-06 00:34:57,139 INFO L226 Difference]: Without dead ends: 13651 [2021-06-06 00:34:57,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:34:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-06-06 00:34:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-06-06 00:34:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-06-06 00:34:57,335 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-06-06 00:34:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:57,335 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-06-06 00:34:57,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-06-06 00:34:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:34:57,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:57,353 INFO L554 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] [2021-06-06 00:34:57,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-06 00:34:57,561 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -96838436, now seen corresponding path program 5 times [2021-06-06 00:34:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:57,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153837474] [2021-06-06 00:34:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:57,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:57,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153837474] [2021-06-06 00:34:57,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153837474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:57,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562053656] [2021-06-06 00:34:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:57,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:34:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:34:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:34:57,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562053656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:57,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:57,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-06 00:34:57,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021621747] [2021-06-06 00:34:57,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:34:57,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:34:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:34:57,688 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-06-06 00:34:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:58,094 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-06-06 00:34:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:34:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 [2021-06-06 00:34:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:58,150 INFO L225 Difference]: With dead ends: 24527 [2021-06-06 00:34:58,151 INFO L226 Difference]: Without dead ends: 24223 [2021-06-06 00:34:58,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:34:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-06-06 00:34:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-06-06 00:34:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-06-06 00:34:58,662 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-06-06 00:34:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:58,662 INFO L482 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-06-06 00:34:58,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-06-06 00:34:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-06-06 00:34:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:34:58,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:58,690 INFO L554 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] [2021-06-06 00:34:58,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:34:58,907 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash -554885668, now seen corresponding path program 6 times [2021-06-06 00:34:58,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:58,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204220703] [2021-06-06 00:34:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:58,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204220703] [2021-06-06 00:34:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204220703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054090494] [2021-06-06 00:34:58,952 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 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 [2021-06-06 00:34:58,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:34:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:58,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:34:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:34:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054090494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:59,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:59,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-06 00:34:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828809700] [2021-06-06 00:34:59,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:34:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:34:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:34:59,147 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-06 00:34:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:59,885 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-06-06 00:34:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:34:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 [2021-06-06 00:34:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:00,172 INFO L225 Difference]: With dead ends: 61524 [2021-06-06 00:35:00,172 INFO L226 Difference]: Without dead ends: 60380 [2021-06-06 00:35:00,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:35:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-06-06 00:35:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-06-06 00:35:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-06-06 00:35:01,292 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-06-06 00:35:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:01,292 INFO L482 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-06-06 00:35:01,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-06 00:35:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-06-06 00:35:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:35:01,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:01,519 INFO L554 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] [2021-06-06 00:35:01,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:01,733 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1161623840, now seen corresponding path program 7 times [2021-06-06 00:35:01,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:01,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168215849] [2021-06-06 00:35:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:35:01,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:01,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168215849] [2021-06-06 00:35:01,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168215849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:01,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269641027] [2021-06-06 00:35:01,845 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 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 [2021-06-06 00:35:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:35:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:35:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269641027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:01,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:01,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-06 00:35:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490512989] [2021-06-06 00:35:01,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:35:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:35:01,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:35:01,962 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-06 00:35:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:02,447 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-06-06 00:35:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:35:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 [2021-06-06 00:35:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:02,582 INFO L225 Difference]: With dead ends: 44403 [2021-06-06 00:35:02,582 INFO L226 Difference]: Without dead ends: 44271 [2021-06-06 00:35:02,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:35:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-06-06 00:35:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-06-06 00:35:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-06-06 00:35:03,578 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-06-06 00:35:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:03,578 INFO L482 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-06-06 00:35:03,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-06-06 00:35:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-06-06 00:35:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:35:03,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:03,646 INFO L554 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] [2021-06-06 00:35:03,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:03,852 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1949095460, now seen corresponding path program 8 times [2021-06-06 00:35:03,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:03,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967298112] [2021-06-06 00:35:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:03,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:03,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967298112] [2021-06-06 00:35:03,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967298112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:03,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254464460] [2021-06-06 00:35:03,910 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 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 [2021-06-06 00:35:03,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:03,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:35:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:04,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254464460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:04,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:04,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-06 00:35:04,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634502017] [2021-06-06 00:35:04,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:35:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:35:04,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:35:04,008 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:05,273 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-06-06 00:35:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:35:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:35:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:05,505 INFO L225 Difference]: With dead ends: 66403 [2021-06-06 00:35:05,505 INFO L226 Difference]: Without dead ends: 64922 [2021-06-06 00:35:05,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:35:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-06-06 00:35:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-06-06 00:35:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-06-06 00:35:06,610 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-06-06 00:35:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:06,610 INFO L482 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-06-06 00:35:06,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-06-06 00:35:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:35:06,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:06,679 INFO L554 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] [2021-06-06 00:35:06,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-06 00:35:06,881 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1143514140, now seen corresponding path program 9 times [2021-06-06 00:35:06,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:06,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617352756] [2021-06-06 00:35:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617352756] [2021-06-06 00:35:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617352756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623373280] [2021-06-06 00:35:06,917 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 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 [2021-06-06 00:35:06,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:35:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:35:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:35:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623373280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:07,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:07,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-06 00:35:07,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243629614] [2021-06-06 00:35:07,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:35:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:35:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:35:07,017 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:08,022 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-06-06 00:35:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:35:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-06 00:35:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:08,220 INFO L225 Difference]: With dead ends: 67837 [2021-06-06 00:35:08,220 INFO L226 Difference]: Without dead ends: 67411 [2021-06-06 00:35:08,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:35:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-06-06 00:35:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-06-06 00:35:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-06-06 00:35:09,308 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-06-06 00:35:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:09,308 INFO L482 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-06-06 00:35:09,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-06-06 00:35:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:35:09,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:09,596 INFO L554 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] [2021-06-06 00:35:09,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:09,796 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash -651453626, now seen corresponding path program 10 times [2021-06-06 00:35:09,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:09,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678110847] [2021-06-06 00:35:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:35:09,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:09,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678110847] [2021-06-06 00:35:09,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678110847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:09,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300738424] [2021-06-06 00:35:09,841 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 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 [2021-06-06 00:35:09,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:35:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:35:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:35:09,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300738424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:09,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:09,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-06 00:35:09,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683085211] [2021-06-06 00:35:09,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:35:09,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:09,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:35:09,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:35:09,945 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:10,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:10,382 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-06-06 00:35:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:35:10,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:35:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:10,567 INFO L225 Difference]: With dead ends: 54540 [2021-06-06 00:35:10,567 INFO L226 Difference]: Without dead ends: 54365 [2021-06-06 00:35:10,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:35:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-06-06 00:35:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-06-06 00:35:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-06-06 00:35:11,743 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-06-06 00:35:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:11,743 INFO L482 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-06-06 00:35:11,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-06-06 00:35:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:35:11,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:11,829 INFO L554 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] [2021-06-06 00:35:12,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:35:12,029 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1136569790, now seen corresponding path program 11 times [2021-06-06 00:35:12,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:12,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110233708] [2021-06-06 00:35:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:12,269 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-06 00:35:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:35:12,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:12,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110233708] [2021-06-06 00:35:12,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110233708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:12,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431880276] [2021-06-06 00:35:12,312 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 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 [2021-06-06 00:35:12,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:35:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:35:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:35:12,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431880276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:12,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:12,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-06 00:35:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52898458] [2021-06-06 00:35:12,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:35:12,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:35:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:35:12,445 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-06-06 00:35:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:12,805 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-06-06 00:35:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:35:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 33 [2021-06-06 00:35:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:12,969 INFO L225 Difference]: With dead ends: 55576 [2021-06-06 00:35:12,969 INFO L226 Difference]: Without dead ends: 55382 [2021-06-06 00:35:12,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:35:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-06-06 00:35:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-06-06 00:35:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-06-06 00:35:14,087 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-06-06 00:35:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:14,087 INFO L482 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-06-06 00:35:14,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-06-06 00:35:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-06-06 00:35:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:35:14,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:14,406 INFO L554 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] [2021-06-06 00:35:14,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:14,621 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1774694910, now seen corresponding path program 12 times [2021-06-06 00:35:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:14,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816700163] [2021-06-06 00:35:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:35:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816700163] [2021-06-06 00:35:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816700163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208132704] [2021-06-06 00:35:14,663 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 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 [2021-06-06 00:35:14,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:35:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:35:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:35:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208132704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:14,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:14,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-06 00:35:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471836734] [2021-06-06 00:35:14,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:35:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:35:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:35:14,792 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:16,594 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-06-06 00:35:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:35:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:35:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:17,052 INFO L225 Difference]: With dead ends: 141398 [2021-06-06 00:35:17,052 INFO L226 Difference]: Without dead ends: 140699 [2021-06-06 00:35:17,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:35:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-06-06 00:35:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-06-06 00:35:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-06-06 00:35:20,223 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-06-06 00:35:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:20,223 INFO L482 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-06-06 00:35:20,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-06-06 00:35:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:35:20,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:20,447 INFO L554 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] [2021-06-06 00:35:20,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:35:20,648 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -908424846, now seen corresponding path program 13 times [2021-06-06 00:35:20,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:20,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352724238] [2021-06-06 00:35:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:35:20,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352724238] [2021-06-06 00:35:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352724238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997914912] [2021-06-06 00:35:20,713 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 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 [2021-06-06 00:35:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:35:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:35:20,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997914912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:20,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:20,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-06 00:35:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146428229] [2021-06-06 00:35:20,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:35:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:35:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:35:20,838 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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) [2021-06-06 00:35:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:22,837 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-06-06 00:35:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:35:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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 35 [2021-06-06 00:35:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:23,976 INFO L225 Difference]: With dead ends: 205700 [2021-06-06 00:35:23,976 INFO L226 Difference]: Without dead ends: 204198 [2021-06-06 00:35:23,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:35:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-06-06 00:35:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-06-06 00:35:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-06-06 00:35:29,809 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-06-06 00:35:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:29,809 INFO L482 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-06-06 00:35:29,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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) [2021-06-06 00:35:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-06-06 00:35:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:35:30,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:30,874 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-06 00:35:31,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-06 00:35:31,089 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1478372264, now seen corresponding path program 14 times [2021-06-06 00:35:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105176753] [2021-06-06 00:35:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:35:31,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105176753] [2021-06-06 00:35:31,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105176753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853895777] [2021-06-06 00:35:31,127 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 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 [2021-06-06 00:35:31,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:31,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:35:31,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-06 00:35:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853895777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:31,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-06 00:35:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834204822] [2021-06-06 00:35:31,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:35:31,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:35:31,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:35:31,242 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:34,893 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-06-06 00:35:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:35:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:37,053 INFO L225 Difference]: With dead ends: 389060 [2021-06-06 00:35:37,054 INFO L226 Difference]: Without dead ends: 387773 [2021-06-06 00:35:37,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:35:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-06-06 00:35:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-06-06 00:35:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-06-06 00:35:47,556 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-06-06 00:35:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:47,557 INFO L482 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-06-06 00:35:47,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-06-06 00:35:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:35:48,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:48,314 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-06 00:35:48,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:35:48,514 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-06-06 00:35:48,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:48,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808568340] [2021-06-06 00:35:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:35:48,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808568340] [2021-06-06 00:35:48,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808568340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:48,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742594778] [2021-06-06 00:35:48,568 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 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 [2021-06-06 00:35:48,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:35:48,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:35:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-06 00:35:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742594778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:48,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:48,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-06 00:35:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069917639] [2021-06-06 00:35:48,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:35:48,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:35:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:35:48,674 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:00,262 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-06-06 00:36:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:36:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:36:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:08,799 INFO L225 Difference]: With dead ends: 1050714 [2021-06-06 00:36:08,800 INFO L226 Difference]: Without dead ends: 1048522 [2021-06-06 00:36:08,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:36:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-06-06 00:36:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-06-06 00:36:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-06-06 00:36:40,845 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-06-06 00:36:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:40,845 INFO L482 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-06-06 00:36:40,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-06-06 00:36:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:36:43,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:43,279 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-06 00:36:43,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-06 00:36:43,479 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:43,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-06-06 00:36:43,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:43,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459381220] [2021-06-06 00:36:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:36:43,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:43,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459381220] [2021-06-06 00:36:43,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459381220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:43,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53591677] [2021-06-06 00:36:43,520 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 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 [2021-06-06 00:36:43,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:36:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:36:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:36:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53591677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:43,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-06 00:36:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072089589] [2021-06-06 00:36:43,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:36:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:36:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:36:43,626 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-06-06 00:36:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:56,407 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-06-06 00:36:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:36:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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 35 [2021-06-06 00:36:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:03,224 INFO L225 Difference]: With dead ends: 955483 [2021-06-06 00:37:03,225 INFO L226 Difference]: Without dead ends: 947993 [2021-06-06 00:37:03,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:37:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-06-06 00:37:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-06-06 00:37:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-06-06 00:37:35,125 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-06-06 00:37:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:35,125 INFO L482 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-06-06 00:37:35,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-06-06 00:37:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-06-06 00:37:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-06 00:37:38,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:38,681 INFO L554 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] [2021-06-06 00:37:38,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:37:38,897 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1224532632, now seen corresponding path program 17 times [2021-06-06 00:37:38,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:38,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559522380] [2021-06-06 00:37:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:37:38,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559522380] [2021-06-06 00:37:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559522380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:38,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876922656] [2021-06-06 00:37:38,952 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 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 [2021-06-06 00:37:38,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:37:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:38,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:37:38,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:37:39,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876922656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:39,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:39,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-06 00:37:39,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670872223] [2021-06-06 00:37:39,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:37:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:37:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:37:39,081 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)