/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-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:14:01,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:14:01,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:14:01,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:14:01,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:14:01,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:14:01,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:14:01,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:14:01,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:14:01,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:14:01,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:14:01,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:14:01,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:14:01,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:14:01,300 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:14:01,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:14:01,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:14:01,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:14:01,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:14:01,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:14:01,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:14:01,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:14:01,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:14:01,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:14:01,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:14:01,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:14:01,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:14:01,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:14:01,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:14:01,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:14:01,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:14:01,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:14:01,606 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:14:01,609 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:14:01,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-06-05 06:14:01,610 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-06-05 06:14:01,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:14:01,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:14:01,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:14:01,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:14:01,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:14:01,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:14:01,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:14:01,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:14:01,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:14:01,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... [2021-06-05 06:14:01,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:14:01,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:14:01,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:14:01,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:14:01,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:14:01,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:14:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:14:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:14:01,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:14:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:14:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:14:01,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:14:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:14:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:14:01,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:14:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:14:01,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:14:01,781 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:14:01,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:14:01,953 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:14:01,954 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:14:01 BoogieIcfgContainer [2021-06-05 06:14:01,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:14:01,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:14:01,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:14:01,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:14:01,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:14:01" (1/2) ... [2021-06-05 06:14:01,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d62ea and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:14:01, skipping insertion in model container [2021-06-05 06:14:01,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:14:01" (2/2) ... [2021-06-05 06:14:01,961 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-06-05 06:14:01,966 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:14:01,966 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:14:01,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:14:01,967 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:14:02,003 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:14:02,021 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:14:02,036 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:14:02,036 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:14:02,037 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:14:02,037 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:14:02,037 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:14:02,037 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:14:02,037 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:14:02,037 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:14:02,044 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2021-06-05 06:14:02,062 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:14:02,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:02,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:02,071 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -221348590, now seen corresponding path program 1 times [2021-06-05 06:14:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:02,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709071528] [2021-06-05 06:14:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:02,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:02,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709071528] [2021-06-05 06:14:02,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709071528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:02,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:02,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:14:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445654812] [2021-06-05 06:14:02,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:14:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:14:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:14:02,318 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:02,367 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2021-06-05 06:14:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:14:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:14:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:02,383 INFO L225 Difference]: With dead ends: 215 [2021-06-05 06:14:02,383 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 06:14:02,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:14:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 06:14:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2021-06-05 06:14:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2021-06-05 06:14:02,462 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2021-06-05 06:14:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:02,463 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2021-06-05 06:14:02,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2021-06-05 06:14:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:02,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:02,465 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:02,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:14:02,466 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -502535438, now seen corresponding path program 1 times [2021-06-05 06:14:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:02,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208018253] [2021-06-05 06:14:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:02,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208018253] [2021-06-05 06:14:02,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208018253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365095041] [2021-06-05 06:14:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:14:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365095041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:02,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:02,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 06:14:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040021133] [2021-06-05 06:14:02,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:02,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:02,745 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:02,833 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2021-06-05 06:14:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 18 [2021-06-05 06:14:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:02,837 INFO L225 Difference]: With dead ends: 345 [2021-06-05 06:14:02,837 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 06:14:02,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 06:14:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2021-06-05 06:14:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2021-06-05 06:14:02,869 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2021-06-05 06:14:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:02,870 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2021-06-05 06:14:02,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2021-06-05 06:14:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:02,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:02,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 06:14:03,104 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -443832396, now seen corresponding path program 1 times [2021-06-05 06:14:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054225711] [2021-06-05 06:14:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054225711] [2021-06-05 06:14:03,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054225711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:14:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942820628] [2021-06-05 06:14:03,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:14:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:14:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,151 INFO L87 Difference]: Start difference. First operand 174 states and 511 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,211 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2021-06-05 06:14:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:14:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,218 INFO L225 Difference]: With dead ends: 242 [2021-06-05 06:14:03,218 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 06:14:03,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 06:14:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2021-06-05 06:14:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2021-06-05 06:14:03,231 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2021-06-05 06:14:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,231 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2021-06-05 06:14:03,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2021-06-05 06:14:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,233 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:14:03,233 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1106549168, now seen corresponding path program 1 times [2021-06-05 06:14:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643612184] [2021-06-05 06:14:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643612184] [2021-06-05 06:14:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643612184] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:14:03,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582758497] [2021-06-05 06:14:03,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:14:03,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:14:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,293 INFO L87 Difference]: Start difference. First operand 190 states and 537 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,344 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2021-06-05 06:14:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:14:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,346 INFO L225 Difference]: With dead ends: 325 [2021-06-05 06:14:03,346 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 06:14:03,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 06:14:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2021-06-05 06:14:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2021-06-05 06:14:03,357 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2021-06-05 06:14:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,357 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2021-06-05 06:14:03,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2021-06-05 06:14:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:14:03,359 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash -471494800, now seen corresponding path program 2 times [2021-06-05 06:14:03,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399609471] [2021-06-05 06:14:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399609471] [2021-06-05 06:14:03,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399609471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:14:03,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812732487] [2021-06-05 06:14:03,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:14:03,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:14:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,414 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,451 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2021-06-05 06:14:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:14:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,453 INFO L225 Difference]: With dead ends: 277 [2021-06-05 06:14:03,453 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 06:14:03,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 06:14:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-06-05 06:14:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2021-06-05 06:14:03,461 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2021-06-05 06:14:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,461 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2021-06-05 06:14:03,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2021-06-05 06:14:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:14:03,462 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,463 INFO L82 PathProgramCache]: Analyzing trace with hash 94645266, now seen corresponding path program 2 times [2021-06-05 06:14:03,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641990900] [2021-06-05 06:14:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641990900] [2021-06-05 06:14:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641990900] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:14:03,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560348148] [2021-06-05 06:14:03,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:14:03,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:14:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,512 INFO L87 Difference]: Start difference. First operand 212 states and 598 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,554 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2021-06-05 06:14:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:14:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,560 INFO L225 Difference]: With dead ends: 275 [2021-06-05 06:14:03,560 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 06:14:03,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 06:14:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2021-06-05 06:14:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2021-06-05 06:14:03,571 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2021-06-05 06:14:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,571 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2021-06-05 06:14:03,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2021-06-05 06:14:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,572 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:14:03,572 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1521986286, now seen corresponding path program 3 times [2021-06-05 06:14:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056539881] [2021-06-05 06:14:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056539881] [2021-06-05 06:14:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056539881] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:14:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432012869] [2021-06-05 06:14:03,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:14:03,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:14:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,622 INFO L87 Difference]: Start difference. First operand 215 states and 610 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,646 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2021-06-05 06:14:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:14:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,648 INFO L225 Difference]: With dead ends: 222 [2021-06-05 06:14:03,648 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 06:14:03,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 06:14:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-06-05 06:14:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-06-05 06:14:03,654 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-06-05 06:14:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,654 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-06-05 06:14:03,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-06-05 06:14:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,655 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 06:14:03,656 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1597316976, now seen corresponding path program 4 times [2021-06-05 06:14:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900690928] [2021-06-05 06:14:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900690928] [2021-06-05 06:14:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900690928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:14:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747963227] [2021-06-05 06:14:03,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:14:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:14:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,700 INFO L87 Difference]: Start difference. First operand 213 states and 608 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,725 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2021-06-05 06:14:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:14:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,728 INFO L225 Difference]: With dead ends: 226 [2021-06-05 06:14:03,728 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 06:14:03,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:14:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 06:14:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-06-05 06:14:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-06-05 06:14:03,737 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2021-06-05 06:14:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,738 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-06-05 06:14:03,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-06-05 06:14:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:14:03,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 06:14:03,739 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1128775952, now seen corresponding path program 5 times [2021-06-05 06:14:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016051868] [2021-06-05 06:14:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016051868] [2021-06-05 06:14:03,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016051868] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:14:03,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:14:03,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:14:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11030709] [2021-06-05 06:14:03,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:14:03,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:14:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,785 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:03,824 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2021-06-05 06:14:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:14:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:14:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:03,827 INFO L225 Difference]: With dead ends: 212 [2021-06-05 06:14:03,827 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 06:14:03,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:14:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 06:14:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-06-05 06:14:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2021-06-05 06:14:03,836 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2021-06-05 06:14:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:03,836 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2021-06-05 06:14:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2021-06-05 06:14:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:14:03,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:03,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:03,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 06:14:03,837 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -81453676, now seen corresponding path program 1 times [2021-06-05 06:14:03,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:03,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578709757] [2021-06-05 06:14:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:03,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578709757] [2021-06-05 06:14:03,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578709757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407655353] [2021-06-05 06:14:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:14:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407655353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:03,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 06:14:03,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631831124] [2021-06-05 06:14:03,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:03,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:03,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:03,967 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:04,011 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2021-06-05 06:14:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:14:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:04,013 INFO L225 Difference]: With dead ends: 251 [2021-06-05 06:14:04,013 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 06:14:04,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 06:14:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2021-06-05 06:14:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2021-06-05 06:14:04,019 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2021-06-05 06:14:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:04,020 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2021-06-05 06:14:04,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2021-06-05 06:14:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:04,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:04,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:04,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:14:04,240 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:04,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1893391950, now seen corresponding path program 1 times [2021-06-05 06:14:04,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:04,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212893263] [2021-06-05 06:14:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:04,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212893263] [2021-06-05 06:14:04,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212893263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088965185] [2021-06-05 06:14:04,324 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 [2021-06-05 06:14:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:14:04,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:04,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:14:04,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:04,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:04,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:04,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:5 [2021-06-05 06:14:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088965185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:04,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:14:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846183979] [2021-06-05 06:14:04,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:14:04,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:14:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:04,580 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:04,718 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2021-06-05 06:14:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22 [2021-06-05 06:14:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:04,723 INFO L225 Difference]: With dead ends: 377 [2021-06-05 06:14:04,723 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 06:14:04,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 06:14:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2021-06-05 06:14:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2021-06-05 06:14:04,731 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2021-06-05 06:14:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:04,732 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2021-06-05 06:14:04,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2021-06-05 06:14:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:04,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:04,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:04,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 06:14:04,945 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash 373177330, now seen corresponding path program 2 times [2021-06-05 06:14:04,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:04,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925217243] [2021-06-05 06:14:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:05,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925217243] [2021-06-05 06:14:05,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925217243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698430437] [2021-06-05 06:14:05,046 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:05,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:05,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:05,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:05,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 06:14:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:14:05,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:05,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 06:14:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698430437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:05,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:14:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163690793] [2021-06-05 06:14:05,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:14:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:14:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:05,266 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:05,366 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2021-06-05 06:14:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:05,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 22 [2021-06-05 06:14:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:05,369 INFO L225 Difference]: With dead ends: 402 [2021-06-05 06:14:05,369 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 06:14:05,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 06:14:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2021-06-05 06:14:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2021-06-05 06:14:05,378 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2021-06-05 06:14:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:05,378 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2021-06-05 06:14:05,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2021-06-05 06:14:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:05,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:05,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:05,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:05,600 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1309111346, now seen corresponding path program 3 times [2021-06-05 06:14:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131040188] [2021-06-05 06:14:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:05,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131040188] [2021-06-05 06:14:05,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131040188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168118835] [2021-06-05 06:14:05,699 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:05,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:14:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:05,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:14:05,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:05,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 06:14:05,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:05,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:05,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2021-06-05 06:14:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168118835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:05,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:14:05,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651602499] [2021-06-05 06:14:05,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:14:05,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:14:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:05,902 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:05,978 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2021-06-05 06:14:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:05,981 INFO L225 Difference]: With dead ends: 461 [2021-06-05 06:14:05,981 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 06:14:05,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 06:14:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-06-05 06:14:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2021-06-05 06:14:05,992 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2021-06-05 06:14:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:05,992 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2021-06-05 06:14:05,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2021-06-05 06:14:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:05,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:05,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:06,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 06:14:06,209 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1440075702, now seen corresponding path program 4 times [2021-06-05 06:14:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:06,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078623400] [2021-06-05 06:14:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078623400] [2021-06-05 06:14:06,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078623400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074689915] [2021-06-05 06:14:06,282 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:06,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:06,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 06:14:06,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:06,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:21 [2021-06-05 06:14:06,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 06:14:06,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:06,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-06-05 06:14:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074689915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:06,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 06:14:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052527439] [2021-06-05 06:14:06,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:06,427 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:06,502 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2021-06-05 06:14:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:06,505 INFO L225 Difference]: With dead ends: 435 [2021-06-05 06:14:06,505 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 06:14:06,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 06:14:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-06-05 06:14:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2021-06-05 06:14:06,514 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2021-06-05 06:14:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:06,515 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2021-06-05 06:14:06,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2021-06-05 06:14:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:06,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:06,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:06,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,729 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash 906040790, now seen corresponding path program 5 times [2021-06-05 06:14:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:06,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478227004] [2021-06-05 06:14:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478227004] [2021-06-05 06:14:06,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478227004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759849745] [2021-06-05 06:14:06,812 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:06,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:06,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 06:14:06,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:14:06,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:06,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:06,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2021-06-05 06:14:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759849745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:06,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:14:06,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698679646] [2021-06-05 06:14:06,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:14:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:14:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:06,986 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:07,067 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2021-06-05 06:14:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:07,070 INFO L225 Difference]: With dead ends: 471 [2021-06-05 06:14:07,070 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 06:14:07,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 06:14:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2021-06-05 06:14:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 06:14:07,081 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 06:14:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:07,081 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 06:14:07,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 06:14:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:14:07,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:07,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:07,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:14:07,305 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1893532402, now seen corresponding path program 6 times [2021-06-05 06:14:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:07,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708019495] [2021-06-05 06:14:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:07,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:07,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708019495] [2021-06-05 06:14:07,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708019495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726812594] [2021-06-05 06:14:07,368 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:07,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:14:07,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:07,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:07,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:07,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:07,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 06:14:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 06:14:07,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:07,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:07,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:07,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-06-05 06:14:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726812594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:07,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:14:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622583419] [2021-06-05 06:14:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:14:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:14:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:07,517 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:07,620 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2021-06-05 06:14:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:14:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:14:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:07,623 INFO L225 Difference]: With dead ends: 463 [2021-06-05 06:14:07,623 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 06:14:07,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 06:14:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2021-06-05 06:14:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 06:14:07,633 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 06:14:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:07,634 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 06:14:07,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 06:14:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:07,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:07,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:07,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:14:07,849 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1605954960, now seen corresponding path program 7 times [2021-06-05 06:14:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640218705] [2021-06-05 06:14:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:07,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:07,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640218705] [2021-06-05 06:14:07,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640218705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763864829] [2021-06-05 06:14:07,881 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763864829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:07,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:14:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270370038] [2021-06-05 06:14:07,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:14:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:14:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:07,996 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:08,117 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2021-06-05 06:14:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:08,123 INFO L225 Difference]: With dead ends: 800 [2021-06-05 06:14:08,123 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 06:14:08,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:14:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 06:14:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2021-06-05 06:14:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2021-06-05 06:14:08,139 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2021-06-05 06:14:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:08,139 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2021-06-05 06:14:08,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2021-06-05 06:14:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:08,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:08,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:08,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:14:08,357 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1027617620, now seen corresponding path program 8 times [2021-06-05 06:14:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:08,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139239424] [2021-06-05 06:14:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:08,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:08,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139239424] [2021-06-05 06:14:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139239424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:08,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872257185] [2021-06-05 06:14:08,397 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:08,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:14:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:08,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872257185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:08,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:08,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:14:08,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051582617] [2021-06-05 06:14:08,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:14:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:14:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:14:08,509 INFO L87 Difference]: Start difference. First operand 428 states and 1322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:08,995 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2021-06-05 06:14:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:14:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:09,002 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 06:14:09,002 INFO L226 Difference]: Without dead ends: 1252 [2021-06-05 06:14:09,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-06-05 06:14:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2021-06-05 06:14:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2021-06-05 06:14:09,024 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2021-06-05 06:14:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:09,024 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2021-06-05 06:14:09,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2021-06-05 06:14:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:09,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:09,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:14:09,241 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 590648912, now seen corresponding path program 9 times [2021-06-05 06:14:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938849876] [2021-06-05 06:14:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:09,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938849876] [2021-06-05 06:14:09,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938849876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885698522] [2021-06-05 06:14:09,267 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:09,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885698522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:09,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:14:09,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004659607] [2021-06-05 06:14:09,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:14:09,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:14:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:09,338 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:09,420 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2021-06-05 06:14:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:09,426 INFO L225 Difference]: With dead ends: 1440 [2021-06-05 06:14:09,426 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 06:14:09,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:14:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 06:14:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2021-06-05 06:14:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2021-06-05 06:14:09,453 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2021-06-05 06:14:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:09,453 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2021-06-05 06:14:09,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2021-06-05 06:14:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:09,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:09,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:09,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:09,677 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1807517862, now seen corresponding path program 10 times [2021-06-05 06:14:09,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:09,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821653286] [2021-06-05 06:14:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:09,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821653286] [2021-06-05 06:14:09,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821653286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184633059] [2021-06-05 06:14:09,703 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:09,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:09,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184633059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:09,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938804642] [2021-06-05 06:14:09,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:09,786 INFO L87 Difference]: Start difference. First operand 986 states and 3247 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:09,854 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2021-06-05 06:14:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:14:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:09,861 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 06:14:09,861 INFO L226 Difference]: Without dead ends: 1343 [2021-06-05 06:14:09,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-06-05 06:14:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2021-06-05 06:14:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2021-06-05 06:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2021-06-05 06:14:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:09,891 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2021-06-05 06:14:09,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2021-06-05 06:14:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:09,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:09,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:10,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:10,117 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash -634548306, now seen corresponding path program 11 times [2021-06-05 06:14:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:10,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504072909] [2021-06-05 06:14:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504072909] [2021-06-05 06:14:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504072909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215491828] [2021-06-05 06:14:10,166 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:10,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:14:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215491828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:10,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:14:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595525191] [2021-06-05 06:14:10,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:14:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:14:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:14:10,258 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:10,358 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2021-06-05 06:14:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:10,368 INFO L225 Difference]: With dead ends: 2033 [2021-06-05 06:14:10,369 INFO L226 Difference]: Without dead ends: 2018 [2021-06-05 06:14:10,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:14:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-06-05 06:14:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2021-06-05 06:14:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2021-06-05 06:14:10,414 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2021-06-05 06:14:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:10,415 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2021-06-05 06:14:10,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2021-06-05 06:14:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:10,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:10,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:10,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:14:10,641 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:10,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1247760558, now seen corresponding path program 12 times [2021-06-05 06:14:10,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:10,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215920990] [2021-06-05 06:14:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215920990] [2021-06-05 06:14:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215920990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709564229] [2021-06-05 06:14:10,667 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:10,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:10,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709564229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:10,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415298592] [2021-06-05 06:14:10,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:10,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:10,746 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:10,822 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2021-06-05 06:14:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:10,831 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 06:14:10,832 INFO L226 Difference]: Without dead ends: 1922 [2021-06-05 06:14:10,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-06-05 06:14:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2021-06-05 06:14:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2021-06-05 06:14:10,869 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2021-06-05 06:14:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:10,869 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2021-06-05 06:14:10,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2021-06-05 06:14:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:10,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:10,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:11,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:11,094 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:11,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2047216916, now seen corresponding path program 13 times [2021-06-05 06:14:11,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:11,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612883266] [2021-06-05 06:14:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:11,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:11,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612883266] [2021-06-05 06:14:11,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612883266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928393681] [2021-06-05 06:14:11,128 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:11,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:11,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928393681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:11,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:11,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774717688] [2021-06-05 06:14:11,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:11,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:11,210 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:11,291 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2021-06-05 06:14:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:14:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:11,307 INFO L225 Difference]: With dead ends: 2961 [2021-06-05 06:14:11,307 INFO L226 Difference]: Without dead ends: 2952 [2021-06-05 06:14:11,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-06-05 06:14:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2021-06-05 06:14:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2021-06-05 06:14:11,367 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2021-06-05 06:14:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:11,367 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2021-06-05 06:14:11,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2021-06-05 06:14:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:11,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:11,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:11,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:14:11,589 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash -657880004, now seen corresponding path program 14 times [2021-06-05 06:14:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:11,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944691913] [2021-06-05 06:14:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:11,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944691913] [2021-06-05 06:14:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944691913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006724000] [2021-06-05 06:14:11,614 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:11,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:11,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:11,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006724000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:11,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969563545] [2021-06-05 06:14:11,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:11,687 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:11,763 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2021-06-05 06:14:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:11,782 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 06:14:11,782 INFO L226 Difference]: Without dead ends: 3041 [2021-06-05 06:14:11,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-05 06:14:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2021-06-05 06:14:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2021-06-05 06:14:11,846 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2021-06-05 06:14:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:11,846 INFO L482 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2021-06-05 06:14:11,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2021-06-05 06:14:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:11,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:11,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:12,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:12,074 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:12,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:12,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1385038064, now seen corresponding path program 15 times [2021-06-05 06:14:12,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:12,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827266728] [2021-06-05 06:14:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:12,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827266728] [2021-06-05 06:14:12,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827266728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:12,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286442627] [2021-06-05 06:14:12,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:12,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:12,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:12,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:12,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286442627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:12,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:12,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:14:12,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027021813] [2021-06-05 06:14:12,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:14:12,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:14:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:14:12,252 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:12,889 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2021-06-05 06:14:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:14:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:12,915 INFO L225 Difference]: With dead ends: 9230 [2021-06-05 06:14:12,916 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 06:14:12,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:14:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 06:14:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2021-06-05 06:14:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2021-06-05 06:14:13,074 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2021-06-05 06:14:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:13,074 INFO L482 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2021-06-05 06:14:13,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2021-06-05 06:14:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:13,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:13,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:13,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:14:13,297 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1687186486, now seen corresponding path program 16 times [2021-06-05 06:14:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:13,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891089196] [2021-06-05 06:14:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:13,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891089196] [2021-06-05 06:14:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891089196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854207016] [2021-06-05 06:14:13,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:13,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:13,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:13,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:14:13,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854207016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:13,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:13,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733044923] [2021-06-05 06:14:13,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:13,409 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:13,537 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2021-06-05 06:14:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:14:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:13,556 INFO L225 Difference]: With dead ends: 5640 [2021-06-05 06:14:13,556 INFO L226 Difference]: Without dead ends: 5614 [2021-06-05 06:14:13,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-06-05 06:14:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2021-06-05 06:14:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2021-06-05 06:14:13,701 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2021-06-05 06:14:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:13,701 INFO L482 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2021-06-05 06:14:13,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2021-06-05 06:14:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:13,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:13,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:13,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:14:13,925 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash -72104176, now seen corresponding path program 17 times [2021-06-05 06:14:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:13,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119787266] [2021-06-05 06:14:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:13,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119787266] [2021-06-05 06:14:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119787266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170379256] [2021-06-05 06:14:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:13,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:14,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170379256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 06:14:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317671510] [2021-06-05 06:14:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:14:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:14:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:14,030 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:14,256 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2021-06-05 06:14:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:14:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 24 [2021-06-05 06:14:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:14,274 INFO L225 Difference]: With dead ends: 6419 [2021-06-05 06:14:14,274 INFO L226 Difference]: Without dead ends: 6345 [2021-06-05 06:14:14,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:14:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2021-06-05 06:14:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2021-06-05 06:14:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2021-06-05 06:14:14,394 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2021-06-05 06:14:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:14,394 INFO L482 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2021-06-05 06:14:14,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2021-06-05 06:14:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:14,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:14,403 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:14:14,624 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1793507450, now seen corresponding path program 18 times [2021-06-05 06:14:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:14,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100136800] [2021-06-05 06:14:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:14,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100136800] [2021-06-05 06:14:14,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100136800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578992338] [2021-06-05 06:14:14,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:14,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:14:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:14,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578992338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:14,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:14,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944346751] [2021-06-05 06:14:14,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:14,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:14,722 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:14,807 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2021-06-05 06:14:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:14:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:14,818 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 06:14:14,818 INFO L226 Difference]: Without dead ends: 5906 [2021-06-05 06:14:14,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:14:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2021-06-05 06:14:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2021-06-05 06:14:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2021-06-05 06:14:14,957 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2021-06-05 06:14:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:14,957 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2021-06-05 06:14:14,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2021-06-05 06:14:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:14,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:14,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:15,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 06:14:15,191 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash -591195082, now seen corresponding path program 19 times [2021-06-05 06:14:15,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:15,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541322795] [2021-06-05 06:14:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:15,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541322795] [2021-06-05 06:14:15,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541322795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243920349] [2021-06-05 06:14:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:14:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:15,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243920349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:15,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 06:14:15,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801566001] [2021-06-05 06:14:15,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:14:15,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:15,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:14:15,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:14:15,319 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:15,407 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2021-06-05 06:14:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:14:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:15,418 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 06:14:15,418 INFO L226 Difference]: Without dead ends: 6177 [2021-06-05 06:14:15,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2021-06-05 06:14:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2021-06-05 06:14:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2021-06-05 06:14:15,541 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2021-06-05 06:14:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:15,541 INFO L482 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2021-06-05 06:14:15,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2021-06-05 06:14:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:15,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:15,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:14:15,769 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1864128790, now seen corresponding path program 20 times [2021-06-05 06:14:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915015119] [2021-06-05 06:14:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:15,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915015119] [2021-06-05 06:14:15,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915015119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24201677] [2021-06-05 06:14:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:15,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:15,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:14:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24201677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:15,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 06:14:15,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967773744] [2021-06-05 06:14:15,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:14:15,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:14:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:15,898 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:16,387 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2021-06-05 06:14:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:14:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:14:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:16,401 INFO L225 Difference]: With dead ends: 7179 [2021-06-05 06:14:16,401 INFO L226 Difference]: Without dead ends: 7111 [2021-06-05 06:14:16,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:14:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-06-05 06:14:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2021-06-05 06:14:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2021-06-05 06:14:16,566 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2021-06-05 06:14:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:16,566 INFO L482 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2021-06-05 06:14:16,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2021-06-05 06:14:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:16,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:16,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:16,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:16,797 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 437269908, now seen corresponding path program 21 times [2021-06-05 06:14:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:16,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378682212] [2021-06-05 06:14:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:16,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378682212] [2021-06-05 06:14:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378682212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922168525] [2021-06-05 06:14:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:16,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:14:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:16,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:14:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:14:16,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922168525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:16,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:16,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 06:14:16,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544637833] [2021-06-05 06:14:16,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:14:16,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:14:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:16,928 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:17,414 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2021-06-05 06:14:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:14:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 24 [2021-06-05 06:14:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:17,446 INFO L225 Difference]: With dead ends: 11751 [2021-06-05 06:14:17,447 INFO L226 Difference]: Without dead ends: 11587 [2021-06-05 06:14:17,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:14:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-06-05 06:14:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2021-06-05 06:14:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2021-06-05 06:14:17,725 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2021-06-05 06:14:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:17,725 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2021-06-05 06:14:17,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2021-06-05 06:14:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:14:17,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:17,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:17,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 06:14:17,957 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1422809918, now seen corresponding path program 22 times [2021-06-05 06:14:17,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:17,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336729985] [2021-06-05 06:14:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:17,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:17,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336729985] [2021-06-05 06:14:17,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336729985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:17,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465869454] [2021-06-05 06:14:17,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:18,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:18,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:18,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:14:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:18,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465869454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:18,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:18,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 06:14:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127063642] [2021-06-05 06:14:18,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:14:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:14:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:14:18,091 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:14:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:18,261 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2021-06-05 06:14:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:14:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 24 [2021-06-05 06:14:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:18,280 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 06:14:18,280 INFO L226 Difference]: Without dead ends: 9392 [2021-06-05 06:14:18,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:14:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-06-05 06:14:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2021-06-05 06:14:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2021-06-05 06:14:18,556 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2021-06-05 06:14:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:18,556 INFO L482 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2021-06-05 06:14:18,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:14:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2021-06-05 06:14:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:18,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:18,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:18,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:18,793 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1052800080, now seen corresponding path program 23 times [2021-06-05 06:14:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:18,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665470104] [2021-06-05 06:14:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:19,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665470104] [2021-06-05 06:14:19,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665470104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135955234] [2021-06-05 06:14:19,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:19,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:14:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:19,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:19,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:19,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:19,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:19,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:67 [2021-06-05 06:14:19,520 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_19], 2=[A]} [2021-06-05 06:14:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:19,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:19,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:19,535 INFO L518 ElimStorePlain]: Eliminatee v_C_19 vanished before elimination [2021-06-05 06:14:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:19,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:14:19,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:19,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:19,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:19,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135955234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:19,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004421167] [2021-06-05 06:14:19,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:19,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:19,575 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:20,249 INFO L93 Difference]: Finished difference Result 11583 states and 42036 transitions. [2021-06-05 06:14:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:20,273 INFO L225 Difference]: With dead ends: 11583 [2021-06-05 06:14:20,274 INFO L226 Difference]: Without dead ends: 11568 [2021-06-05 06:14:20,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2021-06-05 06:14:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 8601. [2021-06-05 06:14:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.716860465116279) internal successors, (31965), 8600 states have internal predecessors, (31965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 31965 transitions. [2021-06-05 06:14:20,432 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 31965 transitions. Word has length 28 [2021-06-05 06:14:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:20,432 INFO L482 AbstractCegarLoop]: Abstraction has 8601 states and 31965 transitions. [2021-06-05 06:14:20,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 31965 transitions. [2021-06-05 06:14:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:20,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:20,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:20,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 06:14:20,665 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1677459088, now seen corresponding path program 24 times [2021-06-05 06:14:20,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:20,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986591761] [2021-06-05 06:14:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:20,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:20,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986591761] [2021-06-05 06:14:20,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986591761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:20,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176650660] [2021-06-05 06:14:20,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:20,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:21,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:21,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:21,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:21,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 06:14:21,251 INFO L446 ElimStorePlain]: Different costs {0=[v_C_21, B], 2=[A]} [2021-06-05 06:14:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:14:21,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:21,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:14:21,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:21,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:21,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:21,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:14:21,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:21,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:21,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:21,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:21,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176650660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:21,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:21,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:21,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614178809] [2021-06-05 06:14:21,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:21,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:21,310 INFO L87 Difference]: Start difference. First operand 8601 states and 31965 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:21,877 INFO L93 Difference]: Finished difference Result 11653 states and 42250 transitions. [2021-06-05 06:14:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:21,905 INFO L225 Difference]: With dead ends: 11653 [2021-06-05 06:14:21,905 INFO L226 Difference]: Without dead ends: 11611 [2021-06-05 06:14:21,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2021-06-05 06:14:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 8620. [2021-06-05 06:14:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8620 states, 8619 states have (on average 3.716092354101404) internal successors, (32029), 8619 states have internal predecessors, (32029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8620 states to 8620 states and 32029 transitions. [2021-06-05 06:14:22,129 INFO L78 Accepts]: Start accepts. Automaton has 8620 states and 32029 transitions. Word has length 28 [2021-06-05 06:14:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:22,129 INFO L482 AbstractCegarLoop]: Abstraction has 8620 states and 32029 transitions. [2021-06-05 06:14:22,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8620 states and 32029 transitions. [2021-06-05 06:14:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:22,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:22,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:22,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 06:14:22,343 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash -350938928, now seen corresponding path program 25 times [2021-06-05 06:14:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:22,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352322404] [2021-06-05 06:14:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:22,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:22,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352322404] [2021-06-05 06:14:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352322404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:22,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74628154] [2021-06-05 06:14:22,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:22,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:22,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:22,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:22,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 06:14:22,882 INFO L446 ElimStorePlain]: Different costs {0=[v_C_23], 3=[A]} [2021-06-05 06:14:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:14:22,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:22,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 06:14:22,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:22,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-06-05 06:14:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:14:22,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:22,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:22,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:14:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74628154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:22,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:22,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458122519] [2021-06-05 06:14:22,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:22,980 INFO L87 Difference]: Start difference. First operand 8620 states and 32029 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:23,562 INFO L93 Difference]: Finished difference Result 11729 states and 42507 transitions. [2021-06-05 06:14:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:23,585 INFO L225 Difference]: With dead ends: 11729 [2021-06-05 06:14:23,585 INFO L226 Difference]: Without dead ends: 11714 [2021-06-05 06:14:23,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2021-06-05 06:14:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 8638. [2021-06-05 06:14:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8638 states, 8637 states have (on average 3.717031376635406) internal successors, (32104), 8637 states have internal predecessors, (32104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 32104 transitions. [2021-06-05 06:14:23,804 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 32104 transitions. Word has length 28 [2021-06-05 06:14:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:23,805 INFO L482 AbstractCegarLoop]: Abstraction has 8638 states and 32104 transitions. [2021-06-05 06:14:23,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 32104 transitions. [2021-06-05 06:14:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:23,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:23,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:24,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:14:24,039 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1471520656, now seen corresponding path program 26 times [2021-06-05 06:14:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:24,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763229141] [2021-06-05 06:14:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:24,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763229141] [2021-06-05 06:14:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763229141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610543949] [2021-06-05 06:14:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:24,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:24,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:24,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:24,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:24,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 06:14:24,620 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_25], 2=[A]} [2021-06-05 06:14:24,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:24,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:24,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:24,633 INFO L518 ElimStorePlain]: Eliminatee v_C_25 vanished before elimination [2021-06-05 06:14:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:24,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:24,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:14:24,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:24,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:24,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:24,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:24,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610543949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:24,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:24,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:24,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26888382] [2021-06-05 06:14:24,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:24,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:24,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:24,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:24,668 INFO L87 Difference]: Start difference. First operand 8638 states and 32104 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:25,308 INFO L93 Difference]: Finished difference Result 11712 states and 42480 transitions. [2021-06-05 06:14:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:25,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:25,386 INFO L225 Difference]: With dead ends: 11712 [2021-06-05 06:14:25,387 INFO L226 Difference]: Without dead ends: 11697 [2021-06-05 06:14:25,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:14:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-06-05 06:14:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 8684. [2021-06-05 06:14:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.71542093746401) internal successors, (32261), 8683 states have internal predecessors, (32261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 32261 transitions. [2021-06-05 06:14:25,515 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 32261 transitions. Word has length 28 [2021-06-05 06:14:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:25,515 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 32261 transitions. [2021-06-05 06:14:25,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 32261 transitions. [2021-06-05 06:14:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:25,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:25,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:25,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:14:25,729 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash -556877360, now seen corresponding path program 27 times [2021-06-05 06:14:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:25,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287338986] [2021-06-05 06:14:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:25,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287338986] [2021-06-05 06:14:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287338986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421395961] [2021-06-05 06:14:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:25,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:14:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:26,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:26,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:26,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:26,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 06:14:26,287 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 3=[A]} [2021-06-05 06:14:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:14:26,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:26,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:26,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 06:14:26,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:26,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:26,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:92 [2021-06-05 06:14:26,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 06:14:26,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:26,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 06:14:26,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:14:26,605 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:14:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 06:14:26,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:14:26,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:26,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:14:26,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:26,673 INFO L628 ElimStorePlain]: treesize reduction 49, result has 55.0 percent of original size [2021-06-05 06:14:26,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:14:26,678 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:212, output treesize:62 [2021-06-05 06:14:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:26,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421395961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:26,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:26,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:14:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705542877] [2021-06-05 06:14:26,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:14:26,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:26,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:14:26,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:14:26,755 INFO L87 Difference]: Start difference. First operand 8684 states and 32261 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:27,610 INFO L93 Difference]: Finished difference Result 11951 states and 43153 transitions. [2021-06-05 06:14:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:14:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 28 [2021-06-05 06:14:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:27,637 INFO L225 Difference]: With dead ends: 11951 [2021-06-05 06:14:27,638 INFO L226 Difference]: Without dead ends: 11879 [2021-06-05 06:14:27,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-06-05 06:14:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 8687. [2021-06-05 06:14:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 3.7159797375086345) internal successors, (32277), 8686 states have internal predecessors, (32277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 32277 transitions. [2021-06-05 06:14:27,817 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 32277 transitions. Word has length 28 [2021-06-05 06:14:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:27,817 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 32277 transitions. [2021-06-05 06:14:27,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 32277 transitions. [2021-06-05 06:14:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:27,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:27,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:28,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:14:28,030 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 108829392, now seen corresponding path program 28 times [2021-06-05 06:14:28,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:28,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404979688] [2021-06-05 06:14:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:28,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:28,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404979688] [2021-06-05 06:14:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404979688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:28,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513906958] [2021-06-05 06:14:28,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:28,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:28,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:28,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:28,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-06-05 06:14:28,468 INFO L446 ElimStorePlain]: Different costs {0=[v_C_29], 3=[A]} [2021-06-05 06:14:28,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:14:28,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:28,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-06-05 06:14:28,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:28,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 06:14:28,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:14:28,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:28,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:28,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:14:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:28,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513906958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:28,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:28,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:28,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390229849] [2021-06-05 06:14:28,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:28,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:28,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:28,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:28,593 INFO L87 Difference]: Start difference. First operand 8687 states and 32277 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:29,232 INFO L93 Difference]: Finished difference Result 11740 states and 42594 transitions. [2021-06-05 06:14:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:29,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:29,255 INFO L225 Difference]: With dead ends: 11740 [2021-06-05 06:14:29,255 INFO L226 Difference]: Without dead ends: 11725 [2021-06-05 06:14:29,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:14:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-06-05 06:14:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 8719. [2021-06-05 06:14:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.714269327827483) internal successors, (32381), 8718 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 32381 transitions. [2021-06-05 06:14:29,438 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 32381 transitions. Word has length 28 [2021-06-05 06:14:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:29,438 INFO L482 AbstractCegarLoop]: Abstraction has 8719 states and 32381 transitions. [2021-06-05 06:14:29,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 32381 transitions. [2021-06-05 06:14:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:29,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:29,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:29,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:29,665 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1194690256, now seen corresponding path program 29 times [2021-06-05 06:14:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:29,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809876342] [2021-06-05 06:14:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:29,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809876342] [2021-06-05 06:14:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809876342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585769794] [2021-06-05 06:14:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:29,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:30,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:30,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:30,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:30,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:30,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-05 06:14:30,210 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_31], 2=[A]} [2021-06-05 06:14:30,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:30,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:30,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:30,229 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:30,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:14:30,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:30,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:30,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:30,251 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:30,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585769794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:30,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:30,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:30,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495918487] [2021-06-05 06:14:30,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:30,274 INFO L87 Difference]: Start difference. First operand 8719 states and 32381 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:31,168 INFO L93 Difference]: Finished difference Result 11783 states and 42686 transitions. [2021-06-05 06:14:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:14:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:31,196 INFO L225 Difference]: With dead ends: 11783 [2021-06-05 06:14:31,196 INFO L226 Difference]: Without dead ends: 11758 [2021-06-05 06:14:31,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-06-05 06:14:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8765. [2021-06-05 06:14:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 3.7110908261068007) internal successors, (32524), 8764 states have internal predecessors, (32524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 32524 transitions. [2021-06-05 06:14:31,340 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 32524 transitions. Word has length 28 [2021-06-05 06:14:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:31,340 INFO L482 AbstractCegarLoop]: Abstraction has 8765 states and 32524 transitions. [2021-06-05 06:14:31,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 32524 transitions. [2021-06-05 06:14:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:31,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:31,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:31,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:31,569 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1819349264, now seen corresponding path program 30 times [2021-06-05 06:14:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:31,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130960410] [2021-06-05 06:14:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:31,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:31,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130960410] [2021-06-05 06:14:31,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130960410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:31,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14483425] [2021-06-05 06:14:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:31,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:31,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:31,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:31,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:31,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:31,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 06:14:32,084 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_33], 2=[A]} [2021-06-05 06:14:32,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:32,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:32,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:32,096 INFO L518 ElimStorePlain]: Eliminatee v_C_33 vanished before elimination [2021-06-05 06:14:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:32,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:32,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:14:32,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:32,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:32,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:32,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14483425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:32,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:32,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415817417] [2021-06-05 06:14:32,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:32,129 INFO L87 Difference]: Start difference. First operand 8765 states and 32524 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:32,734 INFO L93 Difference]: Finished difference Result 11773 states and 42654 transitions. [2021-06-05 06:14:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:14:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:32,757 INFO L225 Difference]: With dead ends: 11773 [2021-06-05 06:14:32,757 INFO L226 Difference]: Without dead ends: 11710 [2021-06-05 06:14:32,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11710 states. [2021-06-05 06:14:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11710 to 8784. [2021-06-05 06:14:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 3.709552544688603) internal successors, (32581), 8783 states have internal predecessors, (32581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 32581 transitions. [2021-06-05 06:14:32,906 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 32581 transitions. Word has length 28 [2021-06-05 06:14:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:32,906 INFO L482 AbstractCegarLoop]: Abstraction has 8784 states and 32581 transitions. [2021-06-05 06:14:32,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 32581 transitions. [2021-06-05 06:14:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:32,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:32,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:33,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 06:14:33,127 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -209048752, now seen corresponding path program 31 times [2021-06-05 06:14:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:33,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962127608] [2021-06-05 06:14:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:33,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962127608] [2021-06-05 06:14:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962127608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308475882] [2021-06-05 06:14:33,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:33,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:33,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:33,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:33,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 06:14:33,595 INFO L446 ElimStorePlain]: Different costs {0=[v_C_35], 3=[A]} [2021-06-05 06:14:33,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:14:33,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 06:14:33,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:33,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-06-05 06:14:33,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:14:33,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:33,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:33,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:14:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308475882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:33,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:33,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851854541] [2021-06-05 06:14:33,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:33,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:33,678 INFO L87 Difference]: Start difference. First operand 8784 states and 32581 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:34,460 INFO L93 Difference]: Finished difference Result 11864 states and 42950 transitions. [2021-06-05 06:14:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:14:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:34,484 INFO L225 Difference]: With dead ends: 11864 [2021-06-05 06:14:34,484 INFO L226 Difference]: Without dead ends: 11839 [2021-06-05 06:14:34,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-06-05 06:14:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 8763. [2021-06-05 06:14:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 3.713421593243552) internal successors, (32537), 8762 states have internal predecessors, (32537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 32537 transitions. [2021-06-05 06:14:34,632 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 32537 transitions. Word has length 28 [2021-06-05 06:14:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:34,632 INFO L482 AbstractCegarLoop]: Abstraction has 8763 states and 32537 transitions. [2021-06-05 06:14:34,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 32537 transitions. [2021-06-05 06:14:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:34,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:34,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:34,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:34,845 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash -691193520, now seen corresponding path program 32 times [2021-06-05 06:14:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:34,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657835056] [2021-06-05 06:14:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:35,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:35,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657835056] [2021-06-05 06:14:35,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657835056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:35,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355288582] [2021-06-05 06:14:35,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:35,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:35,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:35,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:35,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:35,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:35,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 06:14:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:35,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:14:35,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:35,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:35,279 INFO L518 ElimStorePlain]: Eliminatee v_C_37 vanished before elimination [2021-06-05 06:14:35,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:35,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:14:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:35,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355288582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:35,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:35,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:14:35,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422030708] [2021-06-05 06:14:35,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:14:35,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:35,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:14:35,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:14:35,299 INFO L87 Difference]: Start difference. First operand 8763 states and 32537 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:36,002 INFO L93 Difference]: Finished difference Result 9105 states and 33542 transitions. [2021-06-05 06:14:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 06:14:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:36,018 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 06:14:36,018 INFO L226 Difference]: Without dead ends: 9090 [2021-06-05 06:14:36,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-06-05 06:14:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 8789. [2021-06-05 06:14:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.7131315430132) internal successors, (32631), 8788 states have internal predecessors, (32631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 32631 transitions. [2021-06-05 06:14:36,136 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 32631 transitions. Word has length 28 [2021-06-05 06:14:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:36,136 INFO L482 AbstractCegarLoop]: Abstraction has 8789 states and 32631 transitions. [2021-06-05 06:14:36,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 32631 transitions. [2021-06-05 06:14:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:36,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:36,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:36,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 06:14:36,349 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 611501012, now seen corresponding path program 33 times [2021-06-05 06:14:36,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:36,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489830995] [2021-06-05 06:14:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:36,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489830995] [2021-06-05 06:14:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489830995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806477795] [2021-06-05 06:14:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:36,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:14:36,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:14:36,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:36,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:36,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:36,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:36,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:36,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 06:14:36,877 INFO L446 ElimStorePlain]: Different costs {0=[v_C_39], 2=[A, B]} [2021-06-05 06:14:36,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:14:36,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:36,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:36,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 06:14:36,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:14:36,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:36,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 65 [2021-06-05 06:14:36,966 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:14:37,008 INFO L628 ElimStorePlain]: treesize reduction 41, result has 48.1 percent of original size [2021-06-05 06:14:37,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:37,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:38 [2021-06-05 06:14:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806477795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:37,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:37,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:14:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233009793] [2021-06-05 06:14:37,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:14:37,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:14:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:14:37,078 INFO L87 Difference]: Start difference. First operand 8789 states and 32631 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:38,597 INFO L93 Difference]: Finished difference Result 11850 states and 42895 transitions. [2021-06-05 06:14:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:14:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:38,618 INFO L225 Difference]: With dead ends: 11850 [2021-06-05 06:14:38,618 INFO L226 Difference]: Without dead ends: 11767 [2021-06-05 06:14:38,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1069.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:14:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11767 states. [2021-06-05 06:14:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11767 to 8811. [2021-06-05 06:14:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 3.7122587968217933) internal successors, (32705), 8810 states have internal predecessors, (32705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 32705 transitions. [2021-06-05 06:14:38,805 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 32705 transitions. Word has length 28 [2021-06-05 06:14:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:38,805 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 32705 transitions. [2021-06-05 06:14:38,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 32705 transitions. [2021-06-05 06:14:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:38,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:38,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:39,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:39,018 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1679375576, now seen corresponding path program 34 times [2021-06-05 06:14:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:39,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802148088] [2021-06-05 06:14:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:39,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802148088] [2021-06-05 06:14:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802148088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20497052] [2021-06-05 06:14:39,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:39,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:39,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:39,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:39,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 06:14:39,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:39,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:39,493 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:39,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:39,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 06:14:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:14:39,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:39,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:39,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:14:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:39,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20497052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:39,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:39,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:14:39,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047307168] [2021-06-05 06:14:39,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:14:39,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:39,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:14:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:14:39,560 INFO L87 Difference]: Start difference. First operand 8811 states and 32705 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:40,303 INFO L93 Difference]: Finished difference Result 11773 states and 42754 transitions. [2021-06-05 06:14:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:14:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:40,323 INFO L225 Difference]: With dead ends: 11773 [2021-06-05 06:14:40,323 INFO L226 Difference]: Without dead ends: 11758 [2021-06-05 06:14:40,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-06-05 06:14:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8839. [2021-06-05 06:14:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.7121520706042093) internal successors, (32808), 8838 states have internal predecessors, (32808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32808 transitions. [2021-06-05 06:14:40,459 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32808 transitions. Word has length 28 [2021-06-05 06:14:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:40,459 INFO L482 AbstractCegarLoop]: Abstraction has 8839 states and 32808 transitions. [2021-06-05 06:14:40,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32808 transitions. [2021-06-05 06:14:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:40,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:40,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:40,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:40,672 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1494941196, now seen corresponding path program 35 times [2021-06-05 06:14:40,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:40,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356218627] [2021-06-05 06:14:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:40,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:40,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356218627] [2021-06-05 06:14:40,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356218627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:40,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800838841] [2021-06-05 06:14:40,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:40,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:14:40,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:40,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:41,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:41,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:41,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:41,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 06:14:41,185 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_43], 2=[A]} [2021-06-05 06:14:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:41,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:41,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:41,198 INFO L518 ElimStorePlain]: Eliminatee v_C_43 vanished before elimination [2021-06-05 06:14:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:41,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:41,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:14:41,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:41,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:41,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:41,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800838841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:41,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:41,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388506331] [2021-06-05 06:14:41,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:41,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:41,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:41,228 INFO L87 Difference]: Start difference. First operand 8839 states and 32808 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:41,729 INFO L93 Difference]: Finished difference Result 11850 states and 42962 transitions. [2021-06-05 06:14:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:41,749 INFO L225 Difference]: With dead ends: 11850 [2021-06-05 06:14:41,750 INFO L226 Difference]: Without dead ends: 11787 [2021-06-05 06:14:41,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2021-06-05 06:14:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 8865. [2021-06-05 06:14:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 3.7093862815884475) internal successors, (32880), 8864 states have internal predecessors, (32880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 32880 transitions. [2021-06-05 06:14:41,937 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 32880 transitions. Word has length 28 [2021-06-05 06:14:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:41,937 INFO L482 AbstractCegarLoop]: Abstraction has 8865 states and 32880 transitions. [2021-06-05 06:14:41,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 32880 transitions. [2021-06-05 06:14:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:41,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:41,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:42,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 06:14:42,151 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 771628084, now seen corresponding path program 36 times [2021-06-05 06:14:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:42,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411168796] [2021-06-05 06:14:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:42,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:42,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411168796] [2021-06-05 06:14:42,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411168796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:42,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459839508] [2021-06-05 06:14:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:42,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:14:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:14:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:42,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-06-05 06:14:42,764 INFO L446 ElimStorePlain]: Different costs {0=[v_C_45], 3=[A]} [2021-06-05 06:14:42,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:14:42,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:42,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 06:14:42,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:42,870 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:88, output treesize:102 [2021-06-05 06:14:43,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 06:14:43,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:43,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 06:14:43,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:14:43,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:43,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:14:43,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 06:14:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-06-05 06:14:43,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:14:43,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:43,189 INFO L628 ElimStorePlain]: treesize reduction 106, result has 36.1 percent of original size [2021-06-05 06:14:43,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:14:43,191 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:212, output treesize:62 [2021-06-05 06:14:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:43,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459839508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:43,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:43,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:14:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225863478] [2021-06-05 06:14:43,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:14:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:14:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:14:43,249 INFO L87 Difference]: Start difference. First operand 8865 states and 32880 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:44,201 INFO L93 Difference]: Finished difference Result 12047 states and 43486 transitions. [2021-06-05 06:14:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:14:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:44,220 INFO L225 Difference]: With dead ends: 12047 [2021-06-05 06:14:44,220 INFO L226 Difference]: Without dead ends: 11986 [2021-06-05 06:14:44,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 890.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-05 06:14:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 8872. [2021-06-05 06:14:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 3.708826513358133) internal successors, (32901), 8871 states have internal predecessors, (32901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 32901 transitions. [2021-06-05 06:14:44,345 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 32901 transitions. Word has length 28 [2021-06-05 06:14:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:44,345 INFO L482 AbstractCegarLoop]: Abstraction has 8872 states and 32901 transitions. [2021-06-05 06:14:44,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 32901 transitions. [2021-06-05 06:14:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:44,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:44,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:44,565 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1703274480, now seen corresponding path program 37 times [2021-06-05 06:14:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550373512] [2021-06-05 06:14:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:44,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550373512] [2021-06-05 06:14:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550373512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314526808] [2021-06-05 06:14:44,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:44,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:44,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:44,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:44,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:44,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:14:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:45,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:45,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:14:45,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:45,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:45,068 INFO L518 ElimStorePlain]: Eliminatee v_C_47 vanished before elimination [2021-06-05 06:14:45,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:45,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:14:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:45,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314526808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:45,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:45,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:14:45,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725051893] [2021-06-05 06:14:45,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:14:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:45,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:14:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:14:45,087 INFO L87 Difference]: Start difference. First operand 8872 states and 32901 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:45,855 INFO L93 Difference]: Finished difference Result 13042 states and 46993 transitions. [2021-06-05 06:14:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:14:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 06:14:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:45,880 INFO L225 Difference]: With dead ends: 13042 [2021-06-05 06:14:45,880 INFO L226 Difference]: Without dead ends: 12979 [2021-06-05 06:14:45,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2021-06-05 06:14:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 8887. [2021-06-05 06:14:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 3.70717983344587) internal successors, (32942), 8886 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 32942 transitions. [2021-06-05 06:14:46,043 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 32942 transitions. Word has length 28 [2021-06-05 06:14:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:46,043 INFO L482 AbstractCegarLoop]: Abstraction has 8887 states and 32942 transitions. [2021-06-05 06:14:46,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 32942 transitions. [2021-06-05 06:14:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:46,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:46,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:46,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 06:14:46,257 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1572310124, now seen corresponding path program 38 times [2021-06-05 06:14:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:46,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287924713] [2021-06-05 06:14:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:46,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:46,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287924713] [2021-06-05 06:14:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287924713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:46,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256638098] [2021-06-05 06:14:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:46,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:46,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:46,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:14:46,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:46,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:46,693 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:46,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 06:14:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:14:46,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:14:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:46,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256638098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:46,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:46,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:14:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934316792] [2021-06-05 06:14:46,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:14:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:14:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:14:46,743 INFO L87 Difference]: Start difference. First operand 8887 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:47,421 INFO L93 Difference]: Finished difference Result 11822 states and 42875 transitions. [2021-06-05 06:14:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:14:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:47,442 INFO L225 Difference]: With dead ends: 11822 [2021-06-05 06:14:47,442 INFO L226 Difference]: Without dead ends: 11794 [2021-06-05 06:14:47,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-06-05 06:14:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 8890. [2021-06-05 06:14:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8890 states, 8889 states have (on average 3.7077286533918326) internal successors, (32958), 8889 states have internal predecessors, (32958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 32958 transitions. [2021-06-05 06:14:47,575 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 32958 transitions. Word has length 28 [2021-06-05 06:14:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:47,575 INFO L482 AbstractCegarLoop]: Abstraction has 8890 states and 32958 transitions. [2021-06-05 06:14:47,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 32958 transitions. [2021-06-05 06:14:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:47,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:47,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:47,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:47,788 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2106345036, now seen corresponding path program 39 times [2021-06-05 06:14:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:47,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093373256] [2021-06-05 06:14:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:48,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093373256] [2021-06-05 06:14:48,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093373256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88786548] [2021-06-05 06:14:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:14:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:48,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:14:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:48,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:48,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:48,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 06:14:48,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:14:48,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:48,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:49 [2021-06-05 06:14:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:48,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:48,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2021-06-05 06:14:48,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:14:48,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:48,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:100 [2021-06-05 06:14:48,830 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 3=[B, v_prenex_4]} [2021-06-05 06:14:48,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-06-05 06:14:48,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:48,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:48,930 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:14:48,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 51 [2021-06-05 06:14:48,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:48,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:49,025 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-06-05 06:14:49,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-05 06:14:49,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:49,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:49,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:14:49,124 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:199, output treesize:332 [2021-06-05 06:14:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:49,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88786548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:49,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:49,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 06:14:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327426796] [2021-06-05 06:14:49,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:14:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:14:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:49,350 INFO L87 Difference]: Start difference. First operand 8890 states and 32958 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,914 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 06:14:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:50,784 INFO L93 Difference]: Finished difference Result 9148 states and 33670 transitions. [2021-06-05 06:14:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:14:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:50,800 INFO L225 Difference]: With dead ends: 9148 [2021-06-05 06:14:50,800 INFO L226 Difference]: Without dead ends: 9108 [2021-06-05 06:14:50,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1436.2ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9108 states. [2021-06-05 06:14:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9108 to 8909. [2021-06-05 06:14:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7074539739559946) internal successors, (33026), 8908 states have internal predecessors, (33026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33026 transitions. [2021-06-05 06:14:50,925 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33026 transitions. Word has length 28 [2021-06-05 06:14:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:50,925 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33026 transitions. [2021-06-05 06:14:50,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33026 transitions. [2021-06-05 06:14:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:50,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:50,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:51,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 06:14:51,138 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1118853424, now seen corresponding path program 40 times [2021-06-05 06:14:51,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:51,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412514114] [2021-06-05 06:14:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:51,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:51,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412514114] [2021-06-05 06:14:51,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412514114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:51,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040614874] [2021-06-05 06:14:51,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:51,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:51,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 06:14:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:14:51,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:54 [2021-06-05 06:14:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:14:51,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-05 06:14:51,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:14:51,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:14:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:51,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040614874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:51,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:51,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:14:51,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040987386] [2021-06-05 06:14:51,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:14:51,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:51,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:14:51,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:14:51,640 INFO L87 Difference]: Start difference. First operand 8909 states and 33026 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:52,128 INFO L93 Difference]: Finished difference Result 9049 states and 33440 transitions. [2021-06-05 06:14:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:52,144 INFO L225 Difference]: With dead ends: 9049 [2021-06-05 06:14:52,144 INFO L226 Difference]: Without dead ends: 9034 [2021-06-05 06:14:52,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:14:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-06-05 06:14:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 8928. [2021-06-05 06:14:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 3.706956424330682) internal successors, (33092), 8927 states have internal predecessors, (33092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 33092 transitions. [2021-06-05 06:14:52,258 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 33092 transitions. Word has length 28 [2021-06-05 06:14:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:52,258 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 33092 transitions. [2021-06-05 06:14:52,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 33092 transitions. [2021-06-05 06:14:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:52,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:52,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:52,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 06:14:52,471 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash -990845068, now seen corresponding path program 41 times [2021-06-05 06:14:52,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:52,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265314855] [2021-06-05 06:14:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:52,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265314855] [2021-06-05 06:14:52,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265314855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11627407] [2021-06-05 06:14:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:52,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:14:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:52,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:52,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:52,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:52,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:14:52,952 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_55], 2=[A]} [2021-06-05 06:14:52,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:52,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:52,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:52,963 INFO L518 ElimStorePlain]: Eliminatee v_C_55 vanished before elimination [2021-06-05 06:14:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:52,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:52,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:14:52,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:52,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:52,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:52,972 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:52,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11627407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:52,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:52,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549928700] [2021-06-05 06:14:52,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:52,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:52,989 INFO L87 Difference]: Start difference. First operand 8928 states and 33092 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:53,752 INFO L93 Difference]: Finished difference Result 12009 states and 43453 transitions. [2021-06-05 06:14:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:53,775 INFO L225 Difference]: With dead ends: 12009 [2021-06-05 06:14:53,775 INFO L226 Difference]: Without dead ends: 11969 [2021-06-05 06:14:53,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-06-05 06:14:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 8969. [2021-06-05 06:14:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 3.704504906333631) internal successors, (33222), 8968 states have internal predecessors, (33222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 33222 transitions. [2021-06-05 06:14:53,933 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 33222 transitions. Word has length 28 [2021-06-05 06:14:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:53,933 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 33222 transitions. [2021-06-05 06:14:53,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 33222 transitions. [2021-06-05 06:14:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:53,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:53,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:54,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:54,148 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1275724212, now seen corresponding path program 42 times [2021-06-05 06:14:54,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:54,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223905469] [2021-06-05 06:14:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:54,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:54,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223905469] [2021-06-05 06:14:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223905469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:54,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63239091] [2021-06-05 06:14:54,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:54,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:14:54,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:54,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:14:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:54,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 06:14:54,659 INFO L446 ElimStorePlain]: Different costs {0=[v_C_57], 2=[A]} [2021-06-05 06:14:54,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:14:54,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:54,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:14:54,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:35 [2021-06-05 06:14:54,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 06:14:54,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:103 [2021-06-05 06:14:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63239091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:54,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:54,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:14:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115599827] [2021-06-05 06:14:54,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:14:54,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:14:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:14:54,899 INFO L87 Difference]: Start difference. First operand 8969 states and 33222 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:55,590 INFO L93 Difference]: Finished difference Result 12084 states and 43680 transitions. [2021-06-05 06:14:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:55,611 INFO L225 Difference]: With dead ends: 12084 [2021-06-05 06:14:55,611 INFO L226 Difference]: Without dead ends: 12025 [2021-06-05 06:14:55,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12025 states. [2021-06-05 06:14:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12025 to 9008. [2021-06-05 06:14:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.7008993005440214) internal successors, (33334), 9007 states have internal predecessors, (33334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 33334 transitions. [2021-06-05 06:14:55,753 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 33334 transitions. Word has length 28 [2021-06-05 06:14:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:55,753 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 33334 transitions. [2021-06-05 06:14:55,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 33334 transitions. [2021-06-05 06:14:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:55,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:55,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 06:14:55,967 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1941430964, now seen corresponding path program 43 times [2021-06-05 06:14:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19248462] [2021-06-05 06:14:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:56,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:56,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19248462] [2021-06-05 06:14:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19248462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481433614] [2021-06-05 06:14:56,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:56,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:56,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:56,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:56,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:56,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:14:56,355 INFO L446 ElimStorePlain]: Different costs {0=[v_C_59], 3=[A]} [2021-06-05 06:14:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:14:56,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:56,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-06-05 06:14:56,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:56,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 06:14:56,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:14:56,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:56,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:56,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:14:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481433614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:56,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:56,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:56,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454610153] [2021-06-05 06:14:56,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:56,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:56,466 INFO L87 Difference]: Start difference. First operand 9008 states and 33334 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:57,034 INFO L93 Difference]: Finished difference Result 12059 states and 43607 transitions. [2021-06-05 06:14:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:57,054 INFO L225 Difference]: With dead ends: 12059 [2021-06-05 06:14:57,055 INFO L226 Difference]: Without dead ends: 12033 [2021-06-05 06:14:57,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12033 states. [2021-06-05 06:14:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12033 to 9023. [2021-06-05 06:14:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9023 states, 9022 states have (on average 3.7005098647749946) internal successors, (33386), 9022 states have internal predecessors, (33386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 33386 transitions. [2021-06-05 06:14:57,234 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 33386 transitions. Word has length 28 [2021-06-05 06:14:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:57,234 INFO L482 AbstractCegarLoop]: Abstraction has 9023 states and 33386 transitions. [2021-06-05 06:14:57,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 33386 transitions. [2021-06-05 06:14:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:57,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:57,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:57,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 06:14:57,447 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash 664331920, now seen corresponding path program 44 times [2021-06-05 06:14:57,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:57,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55599762] [2021-06-05 06:14:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:57,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:57,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55599762] [2021-06-05 06:14:57,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55599762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:57,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488397671] [2021-06-05 06:14:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:14:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:14:57,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:57,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:57,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:57,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 06:14:58,036 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_61], 2=[A]} [2021-06-05 06:14:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:14:58,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:14:58,054 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:58,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:58,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:14:58,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:14:58,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:58,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:14:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488397671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:58,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:58,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:14:58,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038836224] [2021-06-05 06:14:58,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:14:58,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:14:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:14:58,087 INFO L87 Difference]: Start difference. First operand 9023 states and 33386 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:58,756 INFO L93 Difference]: Finished difference Result 12089 states and 43695 transitions. [2021-06-05 06:14:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:14:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:14:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:58,776 INFO L225 Difference]: With dead ends: 12089 [2021-06-05 06:14:58,776 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 06:14:58,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 06:14:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 9037. [2021-06-05 06:14:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9037 states, 9036 states have (on average 3.699867197875166) internal successors, (33432), 9036 states have internal predecessors, (33432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9037 states to 9037 states and 33432 transitions. [2021-06-05 06:14:58,911 INFO L78 Accepts]: Start accepts. Automaton has 9037 states and 33432 transitions. Word has length 28 [2021-06-05 06:14:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:58,911 INFO L482 AbstractCegarLoop]: Abstraction has 9037 states and 33432 transitions. [2021-06-05 06:14:58,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9037 states and 33432 transitions. [2021-06-05 06:14:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:14:58,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:58,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:59,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:14:59,124 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1364066096, now seen corresponding path program 45 times [2021-06-05 06:14:59,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:59,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442160865] [2021-06-05 06:14:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:59,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:59,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442160865] [2021-06-05 06:14:59,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442160865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:59,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145112491] [2021-06-05 06:14:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:59,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:14:59,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:14:59,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:59,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:14:59,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:59,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:14:59,669 INFO L446 ElimStorePlain]: Different costs {0=[v_C_63], 3=[A]} [2021-06-05 06:14:59,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:14:59,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:59,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:59,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:14:59,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:59,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:91 [2021-06-05 06:14:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:14:59,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 06:14:59,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,869 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:14:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 10 [2021-06-05 06:14:59,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,900 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-06-05 06:14:59,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 25 [2021-06-05 06:14:59,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:59,914 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:14:59,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:14:59,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:00,038 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 06:15:00,038 INFO L628 ElimStorePlain]: treesize reduction 10, result has 91.8 percent of original size [2021-06-05 06:15:00,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:15:00,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:221 [2021-06-05 06:15:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:00,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145112491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:00,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:00,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 19 [2021-06-05 06:15:00,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639941400] [2021-06-05 06:15:00,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:15:00,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:15:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:00,227 INFO L87 Difference]: Start difference. First operand 9037 states and 33432 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:01,441 INFO L93 Difference]: Finished difference Result 12209 states and 44002 transitions. [2021-06-05 06:15:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:15:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:01,462 INFO L225 Difference]: With dead ends: 12209 [2021-06-05 06:15:01,462 INFO L226 Difference]: Without dead ends: 12097 [2021-06-05 06:15:01,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1239.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:15:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12097 states. [2021-06-05 06:15:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12097 to 9048. [2021-06-05 06:15:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9048 states, 9047 states have (on average 3.699458383994694) internal successors, (33469), 9047 states have internal predecessors, (33469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9048 states to 9048 states and 33469 transitions. [2021-06-05 06:15:01,597 INFO L78 Accepts]: Start accepts. Automaton has 9048 states and 33469 transitions. Word has length 28 [2021-06-05 06:15:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:01,597 INFO L482 AbstractCegarLoop]: Abstraction has 9048 states and 33469 transitions. [2021-06-05 06:15:01,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 9048 states and 33469 transitions. [2021-06-05 06:15:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:01,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:01,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:01,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 06:15:01,810 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash -428132080, now seen corresponding path program 46 times [2021-06-05 06:15:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:01,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529509645] [2021-06-05 06:15:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529509645] [2021-06-05 06:15:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529509645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081105031] [2021-06-05 06:15:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:02,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:02,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:02,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:02,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 06:15:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:02,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:02,253 INFO L518 ElimStorePlain]: Eliminatee v_C_65 vanished before elimination [2021-06-05 06:15:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:15:02,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:02,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 06:15:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081105031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:02,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049044706] [2021-06-05 06:15:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:02,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:02,280 INFO L87 Difference]: Start difference. First operand 9048 states and 33469 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:03,298 INFO L93 Difference]: Finished difference Result 13380 states and 48064 transitions. [2021-06-05 06:15:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:15:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 06:15:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:03,322 INFO L225 Difference]: With dead ends: 13380 [2021-06-05 06:15:03,322 INFO L226 Difference]: Without dead ends: 13340 [2021-06-05 06:15:03,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13340 states. [2021-06-05 06:15:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 9063. [2021-06-05 06:15:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9063 states, 9062 states have (on average 3.699073052306334) internal successors, (33521), 9062 states have internal predecessors, (33521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9063 states to 9063 states and 33521 transitions. [2021-06-05 06:15:03,491 INFO L78 Accepts]: Start accepts. Automaton has 9063 states and 33521 transitions. Word has length 28 [2021-06-05 06:15:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:03,491 INFO L482 AbstractCegarLoop]: Abstraction has 9063 states and 33521 transitions. [2021-06-05 06:15:03,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9063 states and 33521 transitions. [2021-06-05 06:15:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:03,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:03,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:03,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:03,706 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:03,706 INFO L82 PathProgramCache]: Analyzing trace with hash -297167724, now seen corresponding path program 47 times [2021-06-05 06:15:03,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:03,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440742455] [2021-06-05 06:15:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:03,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440742455] [2021-06-05 06:15:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440742455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444512915] [2021-06-05 06:15:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:03,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:15:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:15:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:04,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:04,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:04,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:15:04,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:04,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:04,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:04,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 06:15:04,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:15:04,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:04,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:04,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:15:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:04,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444512915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:04,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:04,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:04,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484555360] [2021-06-05 06:15:04,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:04,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:04,168 INFO L87 Difference]: Start difference. First operand 9063 states and 33521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:04,946 INFO L93 Difference]: Finished difference Result 12064 states and 43684 transitions. [2021-06-05 06:15:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:04,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:04,968 INFO L225 Difference]: With dead ends: 12064 [2021-06-05 06:15:04,968 INFO L226 Difference]: Without dead ends: 12049 [2021-06-05 06:15:04,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 584.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12049 states. [2021-06-05 06:15:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12049 to 9065. [2021-06-05 06:15:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9065 states, 9064 states have (on average 3.7009046778464256) internal successors, (33545), 9064 states have internal predecessors, (33545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 33545 transitions. [2021-06-05 06:15:05,117 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 33545 transitions. Word has length 28 [2021-06-05 06:15:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:05,117 INFO L482 AbstractCegarLoop]: Abstraction has 9065 states and 33545 transitions. [2021-06-05 06:15:05,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 33545 transitions. [2021-06-05 06:15:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:05,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:05,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:05,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 06:15:05,331 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash -831202636, now seen corresponding path program 48 times [2021-06-05 06:15:05,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:05,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575809123] [2021-06-05 06:15:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575809123] [2021-06-05 06:15:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575809123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135546391] [2021-06-05 06:15:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:05,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:05,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:05,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:05,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:05,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:15:05,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:05,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-06-05 06:15:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:05,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-06-05 06:15:05,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:05,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:35 [2021-06-05 06:15:05,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:05,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:05,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:05,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:05,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135546391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:05,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:05,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:05,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927298642] [2021-06-05 06:15:05,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:05,900 INFO L87 Difference]: Start difference. First operand 9065 states and 33545 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:06,252 INFO L93 Difference]: Finished difference Result 9201 states and 33924 transitions. [2021-06-05 06:15:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:06,272 INFO L225 Difference]: With dead ends: 9201 [2021-06-05 06:15:06,273 INFO L226 Difference]: Without dead ends: 9158 [2021-06-05 06:15:06,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2021-06-05 06:15:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 9080. [2021-06-05 06:15:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9079 states have (on average 3.699746668135257) internal successors, (33590), 9079 states have internal predecessors, (33590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 33590 transitions. [2021-06-05 06:15:06,396 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 33590 transitions. Word has length 28 [2021-06-05 06:15:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:06,396 INFO L482 AbstractCegarLoop]: Abstraction has 9080 states and 33590 transitions. [2021-06-05 06:15:06,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 33590 transitions. [2021-06-05 06:15:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:06,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:06,409 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:06,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 06:15:06,609 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 156288976, now seen corresponding path program 49 times [2021-06-05 06:15:06,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:06,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173658617] [2021-06-05 06:15:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:06,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173658617] [2021-06-05 06:15:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173658617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369364552] [2021-06-05 06:15:06,878 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:06,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:06,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:06,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:06,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:06,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 06:15:07,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:15:07,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:07,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-06-05 06:15:07,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:07,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:07,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 06:15:07,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:07,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:07,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:15:07,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:07,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:07,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:15:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:07,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369364552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:07,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:07,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989859340] [2021-06-05 06:15:07,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:07,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:07,216 INFO L87 Difference]: Start difference. First operand 9080 states and 33590 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:07,583 INFO L93 Difference]: Finished difference Result 9194 states and 33912 transitions. [2021-06-05 06:15:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:07,602 INFO L225 Difference]: With dead ends: 9194 [2021-06-05 06:15:07,603 INFO L226 Difference]: Without dead ends: 9173 [2021-06-05 06:15:07,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9173 states. [2021-06-05 06:15:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9173 to 9083. [2021-06-05 06:15:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9083 states, 9082 states have (on average 3.700286280554944) internal successors, (33606), 9082 states have internal predecessors, (33606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9083 states to 9083 states and 33606 transitions. [2021-06-05 06:15:07,735 INFO L78 Accepts]: Start accepts. Automaton has 9083 states and 33606 transitions. Word has length 28 [2021-06-05 06:15:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:07,736 INFO L482 AbstractCegarLoop]: Abstraction has 9083 states and 33606 transitions. [2021-06-05 06:15:07,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9083 states and 33606 transitions. [2021-06-05 06:15:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:07,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:07,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:07,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 06:15:07,950 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2126766028, now seen corresponding path program 50 times [2021-06-05 06:15:07,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:07,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71878653] [2021-06-05 06:15:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:08,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71878653] [2021-06-05 06:15:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71878653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187341780] [2021-06-05 06:15:08,151 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:08,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:08,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:08,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:08,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:08,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:08,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:15:08,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:08,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-06-05 06:15:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:08,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 06:15:08,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:08,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:31 [2021-06-05 06:15:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:08,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:08,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:08,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:08,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187341780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:08,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:08,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:08,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720646479] [2021-06-05 06:15:08,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:08,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:08,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:08,432 INFO L87 Difference]: Start difference. First operand 9083 states and 33606 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:08,846 INFO L93 Difference]: Finished difference Result 9264 states and 34143 transitions. [2021-06-05 06:15:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:15:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:08,862 INFO L225 Difference]: With dead ends: 9264 [2021-06-05 06:15:08,862 INFO L226 Difference]: Without dead ends: 9249 [2021-06-05 06:15:08,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:15:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-06-05 06:15:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 9106. [2021-06-05 06:15:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9106 states, 9105 states have (on average 3.700164744645799) internal successors, (33690), 9105 states have internal predecessors, (33690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9106 states to 9106 states and 33690 transitions. [2021-06-05 06:15:08,988 INFO L78 Accepts]: Start accepts. Automaton has 9106 states and 33690 transitions. Word has length 28 [2021-06-05 06:15:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:08,988 INFO L482 AbstractCegarLoop]: Abstraction has 9106 states and 33690 transitions. [2021-06-05 06:15:08,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9106 states and 33690 transitions. [2021-06-05 06:15:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:09,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:09,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:09,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 06:15:09,207 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1959867984, now seen corresponding path program 51 times [2021-06-05 06:15:09,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:09,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927171847] [2021-06-05 06:15:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:09,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:09,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927171847] [2021-06-05 06:15:09,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927171847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057820216] [2021-06-05 06:15:09,395 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:09,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:09,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:15:09,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:09,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:09,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:09,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:09,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:09,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 06:15:09,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:09,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:09,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:09,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:09,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:49 [2021-06-05 06:15:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:09,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:09,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 06:15:09,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:09,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:09,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:09,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:78 [2021-06-05 06:15:10,061 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_10], 3=[v_prenex_9, B]} [2021-06-05 06:15:10,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:10,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:15:10,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:10,150 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-05 06:15:10,169 INFO L354 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2021-06-05 06:15:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 27 [2021-06-05 06:15:10,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:10,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 06:15:10,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:10,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:10,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:15:10,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:128, output treesize:163 [2021-06-05 06:15:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:10,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057820216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:10,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:10,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 19 [2021-06-05 06:15:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284811728] [2021-06-05 06:15:10,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:15:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:15:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:10,444 INFO L87 Difference]: Start difference. First operand 9106 states and 33690 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:11,747 INFO L93 Difference]: Finished difference Result 9329 states and 34311 transitions. [2021-06-05 06:15:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:11,766 INFO L225 Difference]: With dead ends: 9329 [2021-06-05 06:15:11,766 INFO L226 Difference]: Without dead ends: 9289 [2021-06-05 06:15:11,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1088.6ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2021-06-05 06:15:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 9121. [2021-06-05 06:15:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9121 states, 9120 states have (on average 3.699780701754386) internal successors, (33742), 9120 states have internal predecessors, (33742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 33742 transitions. [2021-06-05 06:15:11,891 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 33742 transitions. Word has length 28 [2021-06-05 06:15:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:11,891 INFO L482 AbstractCegarLoop]: Abstraction has 9121 states and 33742 transitions. [2021-06-05 06:15:11,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 33742 transitions. [2021-06-05 06:15:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:11,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:11,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:12,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 06:15:12,186 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:12,187 INFO L82 PathProgramCache]: Analyzing trace with hash -182048560, now seen corresponding path program 52 times [2021-06-05 06:15:12,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:12,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797525029] [2021-06-05 06:15:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:12,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797525029] [2021-06-05 06:15:12,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797525029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57734698] [2021-06-05 06:15:12,411 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:12,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:12,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:12,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:12,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:12,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:12,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:15:12,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:12,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-06-05 06:15:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:12,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:12,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 06:15:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:12,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:15:12,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:12,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:12,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:15:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:12,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57734698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:12,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:12,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:12,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215028776] [2021-06-05 06:15:12,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:12,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:12,704 INFO L87 Difference]: Start difference. First operand 9121 states and 33742 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:13,316 INFO L93 Difference]: Finished difference Result 9265 states and 34168 transitions. [2021-06-05 06:15:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:13,337 INFO L225 Difference]: With dead ends: 9265 [2021-06-05 06:15:13,338 INFO L226 Difference]: Without dead ends: 9250 [2021-06-05 06:15:13,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9250 states. [2021-06-05 06:15:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9250 to 9121. [2021-06-05 06:15:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9121 states, 9120 states have (on average 3.700438596491228) internal successors, (33748), 9120 states have internal predecessors, (33748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 33748 transitions. [2021-06-05 06:15:13,517 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 33748 transitions. Word has length 28 [2021-06-05 06:15:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:13,517 INFO L482 AbstractCegarLoop]: Abstraction has 9121 states and 33748 transitions. [2021-06-05 06:15:13,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 33748 transitions. [2021-06-05 06:15:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:13,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:13,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:13,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 06:15:13,749 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash -853966448, now seen corresponding path program 53 times [2021-06-05 06:15:13,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:13,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098745949] [2021-06-05 06:15:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:13,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:13,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098745949] [2021-06-05 06:15:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098745949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:13,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531966178] [2021-06-05 06:15:13,949 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:13,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:13,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:14,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:14,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 06:15:14,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:14,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:14,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:14,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:14,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:15:14,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:14,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:14,175 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 06:15:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531966178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:14,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:14,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:14,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312793992] [2021-06-05 06:15:14,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:14,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:14,191 INFO L87 Difference]: Start difference. First operand 9121 states and 33748 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:15,410 INFO L93 Difference]: Finished difference Result 14558 states and 52026 transitions. [2021-06-05 06:15:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:15:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 06:15:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:15,439 INFO L225 Difference]: With dead ends: 14558 [2021-06-05 06:15:15,439 INFO L226 Difference]: Without dead ends: 14518 [2021-06-05 06:15:15,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14518 states. [2021-06-05 06:15:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14518 to 9108. [2021-06-05 06:15:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.701328648292522) internal successors, (33708), 9107 states have internal predecessors, (33708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 33708 transitions. [2021-06-05 06:15:15,627 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 33708 transitions. Word has length 28 [2021-06-05 06:15:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:15,627 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 33708 transitions. [2021-06-05 06:15:15,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 33708 transitions. [2021-06-05 06:15:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:15,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:15,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:15,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:15,842 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1306725904, now seen corresponding path program 54 times [2021-06-05 06:15:15,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:15,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844214315] [2021-06-05 06:15:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:16,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:16,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844214315] [2021-06-05 06:15:16,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844214315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:16,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451912150] [2021-06-05 06:15:16,199 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:16,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:16,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:16,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:16,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:15:16,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:16,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:16,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2021-06-05 06:15:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:16,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:16,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 06:15:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:15:16,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:16,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:16,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:15:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:16,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451912150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:16,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:16,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:16,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829069672] [2021-06-05 06:15:16,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:16,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:16,467 INFO L87 Difference]: Start difference. First operand 9108 states and 33708 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:16,875 INFO L93 Difference]: Finished difference Result 9311 states and 34276 transitions. [2021-06-05 06:15:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:15:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:16,893 INFO L225 Difference]: With dead ends: 9311 [2021-06-05 06:15:16,893 INFO L226 Difference]: Without dead ends: 9286 [2021-06-05 06:15:16,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-06-05 06:15:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 9100. [2021-06-05 06:15:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 3.7015056599626335) internal successors, (33680), 9099 states have internal predecessors, (33680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 33680 transitions. [2021-06-05 06:15:17,050 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 33680 transitions. Word has length 28 [2021-06-05 06:15:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:17,050 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 33680 transitions. [2021-06-05 06:15:17,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 33680 transitions. [2021-06-05 06:15:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:17,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:17,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:17,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:17,265 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:17,266 INFO L82 PathProgramCache]: Analyzing trace with hash 177676160, now seen corresponding path program 55 times [2021-06-05 06:15:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:17,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953734126] [2021-06-05 06:15:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:17,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953734126] [2021-06-05 06:15:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953734126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555555452] [2021-06-05 06:15:17,514 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:17,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:17,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:17,739 INFO L446 ElimStorePlain]: Different costs {0=[v_C_83], 2=[A]} [2021-06-05 06:15:17,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:17,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:17,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:17,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:17,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:15:17,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:17,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,771 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 06:15:17,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:17,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:17,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:17,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:17,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555555452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:17,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:17,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:17,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863632212] [2021-06-05 06:15:17,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:17,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:17,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:17,815 INFO L87 Difference]: Start difference. First operand 9100 states and 33680 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:18,559 INFO L93 Difference]: Finished difference Result 12212 states and 44108 transitions. [2021-06-05 06:15:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:15:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:18,583 INFO L225 Difference]: With dead ends: 12212 [2021-06-05 06:15:18,583 INFO L226 Difference]: Without dead ends: 12142 [2021-06-05 06:15:18,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:15:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-06-05 06:15:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 9080. [2021-06-05 06:15:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9079 states have (on average 3.702610419649741) internal successors, (33616), 9079 states have internal predecessors, (33616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 33616 transitions. [2021-06-05 06:15:18,746 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 33616 transitions. Word has length 28 [2021-06-05 06:15:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:18,746 INFO L482 AbstractCegarLoop]: Abstraction has 9080 states and 33616 transitions. [2021-06-05 06:15:18,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 33616 transitions. [2021-06-05 06:15:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:18,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:18,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:18,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:18,960 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:18,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1832853148, now seen corresponding path program 56 times [2021-06-05 06:15:18,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:18,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360501177] [2021-06-05 06:15:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:19,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360501177] [2021-06-05 06:15:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360501177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557879258] [2021-06-05 06:15:19,277 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:19,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:19,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:19,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:19,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:19,470 INFO L446 ElimStorePlain]: Different costs {0=[v_C_85], 2=[A]} [2021-06-05 06:15:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:19,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:19,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:19,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:15:19,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:19,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 06:15:19,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:19,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:19,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:19,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557879258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806817584] [2021-06-05 06:15:19,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:19,555 INFO L87 Difference]: Start difference. First operand 9080 states and 33616 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:20,165 INFO L93 Difference]: Finished difference Result 12188 states and 44009 transitions. [2021-06-05 06:15:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:20,186 INFO L225 Difference]: With dead ends: 12188 [2021-06-05 06:15:20,186 INFO L226 Difference]: Without dead ends: 12116 [2021-06-05 06:15:20,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:15:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2021-06-05 06:15:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 9060. [2021-06-05 06:15:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 3.704161607241417) internal successors, (33556), 9059 states have internal predecessors, (33556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 33556 transitions. [2021-06-05 06:15:20,385 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 33556 transitions. Word has length 28 [2021-06-05 06:15:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:20,385 INFO L482 AbstractCegarLoop]: Abstraction has 9060 states and 33556 transitions. [2021-06-05 06:15:20,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 33556 transitions. [2021-06-05 06:15:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:20,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:20,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:20,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 06:15:20,599 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 861819932, now seen corresponding path program 57 times [2021-06-05 06:15:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:20,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975411624] [2021-06-05 06:15:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:20,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975411624] [2021-06-05 06:15:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975411624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477283831] [2021-06-05 06:15:20,799 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:20,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:15:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:20,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:20,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:20,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:20,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 06:15:20,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:20,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:20,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:20,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:20,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:46 [2021-06-05 06:15:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:21,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 06:15:21,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:21,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:21,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:21,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:78 [2021-06-05 06:15:21,414 INFO L446 ElimStorePlain]: Different costs {0=[B], 2=[v_prenex_14, v_prenex_15]} [2021-06-05 06:15:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:21,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:21,475 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.9 percent of original size [2021-06-05 06:15:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-06-05 06:15:21,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:21,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:21,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:21,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:21,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:21,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:15:21,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:62 [2021-06-05 06:15:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:21,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477283831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:21,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:21,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:15:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967003335] [2021-06-05 06:15:21,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:15:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:15:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:15:21,629 INFO L87 Difference]: Start difference. First operand 9060 states and 33556 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:22,622 INFO L93 Difference]: Finished difference Result 9349 states and 34351 transitions. [2021-06-05 06:15:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:22,640 INFO L225 Difference]: With dead ends: 9349 [2021-06-05 06:15:22,641 INFO L226 Difference]: Without dead ends: 9309 [2021-06-05 06:15:22,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:15:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9309 states. [2021-06-05 06:15:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9309 to 9040. [2021-06-05 06:15:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9040 states, 9039 states have (on average 3.7059409226684368) internal successors, (33498), 9039 states have internal predecessors, (33498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 33498 transitions. [2021-06-05 06:15:22,763 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 33498 transitions. Word has length 28 [2021-06-05 06:15:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:22,764 INFO L482 AbstractCegarLoop]: Abstraction has 9040 states and 33498 transitions. [2021-06-05 06:15:22,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 33498 transitions. [2021-06-05 06:15:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:22,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:22,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:22,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:22,978 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash -23804464, now seen corresponding path program 58 times [2021-06-05 06:15:22,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:22,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785747163] [2021-06-05 06:15:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:23,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785747163] [2021-06-05 06:15:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785747163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801321370] [2021-06-05 06:15:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:23,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:23,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 06:15:23,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:23,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:23,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:23,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:15:23,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:23,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:23,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 06:15:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801321370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855664016] [2021-06-05 06:15:23,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:23,494 INFO L87 Difference]: Start difference. First operand 9040 states and 33498 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:24,651 INFO L93 Difference]: Finished difference Result 10525 states and 37719 transitions. [2021-06-05 06:15:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:15:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:24,670 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 06:15:24,670 INFO L226 Difference]: Without dead ends: 10495 [2021-06-05 06:15:24,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 971.7ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:15:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-06-05 06:15:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9117. [2021-06-05 06:15:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9117 states, 9116 states have (on average 3.703488372093023) internal successors, (33761), 9116 states have internal predecessors, (33761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9117 states to 9117 states and 33761 transitions. [2021-06-05 06:15:24,810 INFO L78 Accepts]: Start accepts. Automaton has 9117 states and 33761 transitions. Word has length 28 [2021-06-05 06:15:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 9117 states and 33761 transitions. [2021-06-05 06:15:24,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9117 states and 33761 transitions. [2021-06-05 06:15:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:24,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:24,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:25,025 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 600854544, now seen corresponding path program 59 times [2021-06-05 06:15:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315468381] [2021-06-05 06:15:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315468381] [2021-06-05 06:15:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315468381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757569390] [2021-06-05 06:15:25,348 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:25,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:15:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:25,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:25,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:25,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:25,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 06:15:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:25,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:25,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:25,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:15:25,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:25,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:25,558 INFO L518 ElimStorePlain]: Eliminatee v_C_91 vanished before elimination [2021-06-05 06:15:25,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:25,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:15:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757569390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:25,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:25,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658939408] [2021-06-05 06:15:25,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:25,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:25,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:25,574 INFO L87 Difference]: Start difference. First operand 9117 states and 33761 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,470 INFO L93 Difference]: Finished difference Result 10439 states and 37480 transitions. [2021-06-05 06:15:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:15:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,492 INFO L225 Difference]: With dead ends: 10439 [2021-06-05 06:15:26,492 INFO L226 Difference]: Without dead ends: 10382 [2021-06-05 06:15:26,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2021-06-05 06:15:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 9142. [2021-06-05 06:15:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 3.702111366371294) internal successors, (33841), 9141 states have internal predecessors, (33841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 33841 transitions. [2021-06-05 06:15:26,655 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 33841 transitions. Word has length 28 [2021-06-05 06:15:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,655 INFO L482 AbstractCegarLoop]: Abstraction has 9142 states and 33841 transitions. [2021-06-05 06:15:26,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 33841 transitions. [2021-06-05 06:15:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:26,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:26,869 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1427543472, now seen corresponding path program 60 times [2021-06-05 06:15:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574306475] [2021-06-05 06:15:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574306475] [2021-06-05 06:15:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574306475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582652491] [2021-06-05 06:15:27,030 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:27,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:15:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:15:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:27,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 06:15:27,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:27,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:15:27,217 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:27,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-06-05 06:15:27,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 06:15:27,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:27,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:55 [2021-06-05 06:15:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582652491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:27,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:15:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909525982] [2021-06-05 06:15:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:15:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:15:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:15:27,340 INFO L87 Difference]: Start difference. First operand 9142 states and 33841 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:28,028 INFO L93 Difference]: Finished difference Result 9297 states and 34300 transitions. [2021-06-05 06:15:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:15:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:28,045 INFO L225 Difference]: With dead ends: 9297 [2021-06-05 06:15:28,045 INFO L226 Difference]: Without dead ends: 9282 [2021-06-05 06:15:28,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:15:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-05 06:15:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 9137. [2021-06-05 06:15:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9137 states, 9136 states have (on average 3.7039185639229424) internal successors, (33839), 9136 states have internal predecessors, (33839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9137 states to 9137 states and 33839 transitions. [2021-06-05 06:15:28,167 INFO L78 Accepts]: Start accepts. Automaton has 9137 states and 33839 transitions. Word has length 28 [2021-06-05 06:15:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:28,167 INFO L482 AbstractCegarLoop]: Abstraction has 9137 states and 33839 transitions. [2021-06-05 06:15:28,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 9137 states and 33839 transitions. [2021-06-05 06:15:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:28,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:28,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:28,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 06:15:28,380 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1909688240, now seen corresponding path program 61 times [2021-06-05 06:15:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109335625] [2021-06-05 06:15:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:28,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109335625] [2021-06-05 06:15:28,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109335625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693536171] [2021-06-05 06:15:28,629 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:28,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:28,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:28,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:28,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:65 [2021-06-05 06:15:28,894 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_95], 2=[B]} [2021-06-05 06:15:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:28,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:28,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:28,904 INFO L518 ElimStorePlain]: Eliminatee v_C_95 vanished before elimination [2021-06-05 06:15:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:28,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:15:28,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:28,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:28,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:28,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693536171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:28,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:28,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298466398] [2021-06-05 06:15:28,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:28,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:28,931 INFO L87 Difference]: Start difference. First operand 9137 states and 33839 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:29,489 INFO L93 Difference]: Finished difference Result 11789 states and 42730 transitions. [2021-06-05 06:15:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:29,556 INFO L225 Difference]: With dead ends: 11789 [2021-06-05 06:15:29,556 INFO L226 Difference]: Without dead ends: 11764 [2021-06-05 06:15:29,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2021-06-05 06:15:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 9159. [2021-06-05 06:15:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9159 states, 9158 states have (on average 3.7034286962218825) internal successors, (33916), 9158 states have internal predecessors, (33916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9159 states to 9159 states and 33916 transitions. [2021-06-05 06:15:29,682 INFO L78 Accepts]: Start accepts. Automaton has 9159 states and 33916 transitions. Word has length 28 [2021-06-05 06:15:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:29,682 INFO L482 AbstractCegarLoop]: Abstraction has 9159 states and 33916 transitions. [2021-06-05 06:15:29,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 9159 states and 33916 transitions. [2021-06-05 06:15:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:29,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:29,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:29,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:29,896 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash -606993708, now seen corresponding path program 62 times [2021-06-05 06:15:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:29,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881735637] [2021-06-05 06:15:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881735637] [2021-06-05 06:15:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881735637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985309689] [2021-06-05 06:15:30,106 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:30,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:30,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:30,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-06-05 06:15:30,320 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_97], 2=[B]} [2021-06-05 06:15:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:30,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:15:30,333 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:30,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:30,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:30,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:30,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,349 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985309689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:30,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138628359] [2021-06-05 06:15:30,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:30,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:30,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:30,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:30,364 INFO L87 Difference]: Start difference. First operand 9159 states and 33916 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:30,825 INFO L93 Difference]: Finished difference Result 11705 states and 42498 transitions. [2021-06-05 06:15:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:30,846 INFO L225 Difference]: With dead ends: 11705 [2021-06-05 06:15:30,847 INFO L226 Difference]: Without dead ends: 11644 [2021-06-05 06:15:30,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11644 states. [2021-06-05 06:15:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11644 to 9176. [2021-06-05 06:15:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9176 states, 9175 states have (on average 3.701907356948229) internal successors, (33965), 9175 states have internal predecessors, (33965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 33965 transitions. [2021-06-05 06:15:30,982 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 33965 transitions. Word has length 28 [2021-06-05 06:15:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:30,982 INFO L482 AbstractCegarLoop]: Abstraction has 9176 states and 33965 transitions. [2021-06-05 06:15:30,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 33965 transitions. [2021-06-05 06:15:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:30,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:30,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:31,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,196 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 460880856, now seen corresponding path program 63 times [2021-06-05 06:15:31,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:31,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068389559] [2021-06-05 06:15:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:31,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:31,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068389559] [2021-06-05 06:15:31,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068389559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647655297] [2021-06-05 06:15:31,437 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:31,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:31,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:31,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 06:15:31,622 INFO L446 ElimStorePlain]: Different costs {0=[v_C_99], 2=[B]} [2021-06-05 06:15:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:31,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:31,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:31,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:15:31,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:31,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 06:15:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:31,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:31,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:31,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647655297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:31,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:31,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879591370] [2021-06-05 06:15:31,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:31,694 INFO L87 Difference]: Start difference. First operand 9176 states and 33965 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:32,153 INFO L93 Difference]: Finished difference Result 11742 states and 42631 transitions. [2021-06-05 06:15:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:32,175 INFO L225 Difference]: With dead ends: 11742 [2021-06-05 06:15:32,175 INFO L226 Difference]: Without dead ends: 11717 [2021-06-05 06:15:32,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:15:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-06-05 06:15:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 9163. [2021-06-05 06:15:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9163 states, 9162 states have (on average 3.7049770792403405) internal successors, (33945), 9162 states have internal predecessors, (33945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 33945 transitions. [2021-06-05 06:15:32,333 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 33945 transitions. Word has length 28 [2021-06-05 06:15:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:32,333 INFO L482 AbstractCegarLoop]: Abstraction has 9163 states and 33945 transitions. [2021-06-05 06:15:32,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 33945 transitions. [2021-06-05 06:15:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:32,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:32,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:32,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 06:15:32,547 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:32,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1581531380, now seen corresponding path program 64 times [2021-06-05 06:15:32,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:32,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777622769] [2021-06-05 06:15:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:32,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:32,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777622769] [2021-06-05 06:15:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777622769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:32,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041857745] [2021-06-05 06:15:32,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:32,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:32,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:32,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:32,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:32,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:32,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 06:15:33,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:33,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:33,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:15:33,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:33,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:33,083 INFO L518 ElimStorePlain]: Eliminatee v_C_101 vanished before elimination [2021-06-05 06:15:33,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:33,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:15:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:33,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041857745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:33,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:33,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45863788] [2021-06-05 06:15:33,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:33,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:33,112 INFO L87 Difference]: Start difference. First operand 9163 states and 33945 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:33,914 INFO L93 Difference]: Finished difference Result 12047 states and 43561 transitions. [2021-06-05 06:15:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:15:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:33,935 INFO L225 Difference]: With dead ends: 12047 [2021-06-05 06:15:33,935 INFO L226 Difference]: Without dead ends: 11964 [2021-06-05 06:15:33,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 727.5ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:15:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11964 states. [2021-06-05 06:15:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11964 to 9281. [2021-06-05 06:15:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9280 states have (on average 3.6988146551724137) internal successors, (34325), 9280 states have internal predecessors, (34325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 34325 transitions. [2021-06-05 06:15:34,074 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 34325 transitions. Word has length 28 [2021-06-05 06:15:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 9281 states and 34325 transitions. [2021-06-05 06:15:34,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 34325 transitions. [2021-06-05 06:15:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:34,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:34,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:34,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:34,288 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash -446866636, now seen corresponding path program 65 times [2021-06-05 06:15:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:34,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165060409] [2021-06-05 06:15:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:34,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165060409] [2021-06-05 06:15:34,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165060409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023347495] [2021-06-05 06:15:34,541 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:34,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:15:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:34,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:34,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 06:15:34,691 INFO L446 ElimStorePlain]: Different costs {0=[v_C_103], 1=[A]} [2021-06-05 06:15:34,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:15:34,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:34,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:15:34,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:34,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 06:15:34,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:15:34,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:34,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:34,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:15:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:34,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023347495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:34,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:34,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:34,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924892311] [2021-06-05 06:15:34,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:34,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:34,751 INFO L87 Difference]: Start difference. First operand 9281 states and 34325 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:35,020 INFO L93 Difference]: Finished difference Result 9379 states and 34583 transitions. [2021-06-05 06:15:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:15:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:35,037 INFO L225 Difference]: With dead ends: 9379 [2021-06-05 06:15:35,037 INFO L226 Difference]: Without dead ends: 9353 [2021-06-05 06:15:35,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-06-05 06:15:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 9272. [2021-06-05 06:15:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 3.7013267177219284) internal successors, (34315), 9271 states have internal predecessors, (34315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 34315 transitions. [2021-06-05 06:15:35,158 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 34315 transitions. Word has length 28 [2021-06-05 06:15:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:35,158 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 34315 transitions. [2021-06-05 06:15:35,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 34315 transitions. [2021-06-05 06:15:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:35,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:35,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:35,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:35,371 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1373198096, now seen corresponding path program 66 times [2021-06-05 06:15:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:35,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060939840] [2021-06-05 06:15:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060939840] [2021-06-05 06:15:35,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060939840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532692721] [2021-06-05 06:15:35,632 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:35,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:15:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:15:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:35,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:35,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:35,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:35,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 06:15:35,850 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_105], 2=[B]} [2021-06-05 06:15:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:35,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:35,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:35,862 INFO L518 ElimStorePlain]: Eliminatee v_C_105 vanished before elimination [2021-06-05 06:15:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:35,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:35,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:35,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:35,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:35,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532692721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:35,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737681723] [2021-06-05 06:15:35,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:35,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:35,892 INFO L87 Difference]: Start difference. First operand 9272 states and 34315 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:36,249 INFO L93 Difference]: Finished difference Result 11800 states and 42865 transitions. [2021-06-05 06:15:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:36,270 INFO L225 Difference]: With dead ends: 11800 [2021-06-05 06:15:36,270 INFO L226 Difference]: Without dead ends: 11737 [2021-06-05 06:15:36,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-06-05 06:15:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 9283. [2021-06-05 06:15:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 3.6996336996337) internal successors, (34340), 9282 states have internal predecessors, (34340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 34340 transitions. [2021-06-05 06:15:36,422 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 34340 transitions. Word has length 28 [2021-06-05 06:15:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:36,423 INFO L482 AbstractCegarLoop]: Abstraction has 9283 states and 34340 transitions. [2021-06-05 06:15:36,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 34340 transitions. [2021-06-05 06:15:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:36,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:36,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 06:15:36,641 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1504162452, now seen corresponding path program 67 times [2021-06-05 06:15:36,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:36,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928514720] [2021-06-05 06:15:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:36,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928514720] [2021-06-05 06:15:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928514720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118149971] [2021-06-05 06:15:36,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:36,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:36,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:36,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:36,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:36,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 06:15:37,074 INFO L446 ElimStorePlain]: Different costs {0=[v_C_107], 2=[B]} [2021-06-05 06:15:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:37,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:37,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:37,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:37,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:15:37,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:37,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:37,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:37,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 06:15:37,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:37,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:37,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:37,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:37,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118149971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:37,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015642900] [2021-06-05 06:15:37,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:37,158 INFO L87 Difference]: Start difference. First operand 9283 states and 34340 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:37,644 INFO L93 Difference]: Finished difference Result 11829 states and 42932 transitions. [2021-06-05 06:15:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:37,664 INFO L225 Difference]: With dead ends: 11829 [2021-06-05 06:15:37,664 INFO L226 Difference]: Without dead ends: 11790 [2021-06-05 06:15:37,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11790 states. [2021-06-05 06:15:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11790 to 9282. [2021-06-05 06:15:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9282 states, 9281 states have (on average 3.7005710591531087) internal successors, (34345), 9281 states have internal predecessors, (34345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9282 states to 9282 states and 34345 transitions. [2021-06-05 06:15:37,842 INFO L78 Accepts]: Start accepts. Automaton has 9282 states and 34345 transitions. Word has length 28 [2021-06-05 06:15:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:37,842 INFO L482 AbstractCegarLoop]: Abstraction has 9282 states and 34345 transitions. [2021-06-05 06:15:37,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9282 states and 34345 transitions. [2021-06-05 06:15:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:37,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:37,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:38,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 06:15:38,056 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 970127540, now seen corresponding path program 68 times [2021-06-05 06:15:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:38,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121289103] [2021-06-05 06:15:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:38,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121289103] [2021-06-05 06:15:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121289103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956910503] [2021-06-05 06:15:38,449 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:38,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:38,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:38,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:38,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:38,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 06:15:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:38,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:38,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-06-05 06:15:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:15:38,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:38,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 06:15:38,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:38,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:15:38,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:38,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:38,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:15:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956910503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:38,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602437930] [2021-06-05 06:15:38,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:38,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:38,695 INFO L87 Difference]: Start difference. First operand 9282 states and 34345 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:39,081 INFO L93 Difference]: Finished difference Result 9436 states and 34801 transitions. [2021-06-05 06:15:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:15:39,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:39,098 INFO L225 Difference]: With dead ends: 9436 [2021-06-05 06:15:39,098 INFO L226 Difference]: Without dead ends: 9421 [2021-06-05 06:15:39,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9421 states. [2021-06-05 06:15:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9421 to 9297. [2021-06-05 06:15:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.7001936316695354) internal successors, (34397), 9296 states have internal predecessors, (34397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 34397 transitions. [2021-06-05 06:15:39,224 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 34397 transitions. Word has length 28 [2021-06-05 06:15:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:39,224 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 34397 transitions. [2021-06-05 06:15:39,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 34397 transitions. [2021-06-05 06:15:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:39,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:39,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:39,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 06:15:39,439 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1957619152, now seen corresponding path program 69 times [2021-06-05 06:15:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:39,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987550537] [2021-06-05 06:15:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:39,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:39,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987550537] [2021-06-05 06:15:39,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987550537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23987182] [2021-06-05 06:15:39,630 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:39,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:15:39,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:15:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:39,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:39,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:39,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:39,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:15:39,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:39,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:39,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:39,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:39,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:51 [2021-06-05 06:15:39,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:39,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 06:15:39,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:39,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:39,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:39,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:78 [2021-06-05 06:15:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:40,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 06:15:40,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:40,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:40,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 06:15:40,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:40,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:40,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:40,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:40,091 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:15:40,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 06:15:40,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:40,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:40,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:40,159 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.3 percent of original size [2021-06-05 06:15:40,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:15:40,161 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:226, output treesize:72 [2021-06-05 06:15:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23987182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:40,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:15:40,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063998478] [2021-06-05 06:15:40,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:15:40,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:15:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:15:40,269 INFO L87 Difference]: Start difference. First operand 9297 states and 34397 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:41,297 INFO L93 Difference]: Finished difference Result 9698 states and 35514 transitions. [2021-06-05 06:15:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:15:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 28 [2021-06-05 06:15:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:41,314 INFO L225 Difference]: With dead ends: 9698 [2021-06-05 06:15:41,314 INFO L226 Difference]: Without dead ends: 9648 [2021-06-05 06:15:41,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:15:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-06-05 06:15:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 9300. [2021-06-05 06:15:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 3.7007205075814604) internal successors, (34413), 9299 states have internal predecessors, (34413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 34413 transitions. [2021-06-05 06:15:41,439 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 34413 transitions. Word has length 28 [2021-06-05 06:15:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:41,439 INFO L482 AbstractCegarLoop]: Abstraction has 9300 states and 34413 transitions. [2021-06-05 06:15:41,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 34413 transitions. [2021-06-05 06:15:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:41,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:41,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,653 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1034979504, now seen corresponding path program 70 times [2021-06-05 06:15:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735956570] [2021-06-05 06:15:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:41,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735956570] [2021-06-05 06:15:41,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735956570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225288463] [2021-06-05 06:15:41,859 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:41,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:42,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:42,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:42,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:42,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:42,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:65 [2021-06-05 06:15:42,087 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_113], 2=[B]} [2021-06-05 06:15:42,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:42,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:42,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:42,178 INFO L518 ElimStorePlain]: Eliminatee v_C_113 vanished before elimination [2021-06-05 06:15:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:42,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:42,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:42,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:42,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:42,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:42,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225288463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:42,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:42,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543273707] [2021-06-05 06:15:42,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:42,204 INFO L87 Difference]: Start difference. First operand 9300 states and 34413 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:42,762 INFO L93 Difference]: Finished difference Result 12022 states and 43590 transitions. [2021-06-05 06:15:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:42,784 INFO L225 Difference]: With dead ends: 12022 [2021-06-05 06:15:42,784 INFO L226 Difference]: Without dead ends: 12007 [2021-06-05 06:15:42,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12007 states. [2021-06-05 06:15:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12007 to 9336. [2021-06-05 06:15:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.698018211033744) internal successors, (34521), 9335 states have internal predecessors, (34521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 34521 transitions. [2021-06-05 06:15:42,926 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 34521 transitions. Word has length 28 [2021-06-05 06:15:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:42,926 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 34521 transitions. [2021-06-05 06:15:42,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 34521 transitions. [2021-06-05 06:15:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:42,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:42,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:43,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 06:15:43,141 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash 267715028, now seen corresponding path program 71 times [2021-06-05 06:15:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:43,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172793777] [2021-06-05 06:15:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:43,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:43,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172793777] [2021-06-05 06:15:43,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172793777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:43,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408448447] [2021-06-05 06:15:43,355 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:43,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:43,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:43,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:43,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:43,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-06-05 06:15:43,588 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_115], 2=[B]} [2021-06-05 06:15:43,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:43,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:43,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:43,599 INFO L518 ElimStorePlain]: Eliminatee v_C_115 vanished before elimination [2021-06-05 06:15:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:43,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:43,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:43,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:43,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:43,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:43,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408448447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:43,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:43,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:43,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018116991] [2021-06-05 06:15:43,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:43,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:43,624 INFO L87 Difference]: Start difference. First operand 9336 states and 34521 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:44,075 INFO L93 Difference]: Finished difference Result 11944 states and 43338 transitions. [2021-06-05 06:15:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:44,096 INFO L225 Difference]: With dead ends: 11944 [2021-06-05 06:15:44,096 INFO L226 Difference]: Without dead ends: 11904 [2021-06-05 06:15:44,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11904 states. [2021-06-05 06:15:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11904 to 9350. [2021-06-05 06:15:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9350 states, 9349 states have (on average 3.697400791528506) internal successors, (34567), 9349 states have internal predecessors, (34567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9350 states to 9350 states and 34567 transitions. [2021-06-05 06:15:44,244 INFO L78 Accepts]: Start accepts. Automaton has 9350 states and 34567 transitions. Word has length 28 [2021-06-05 06:15:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:44,244 INFO L482 AbstractCegarLoop]: Abstraction has 9350 states and 34567 transitions. [2021-06-05 06:15:44,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9350 states and 34567 transitions. [2021-06-05 06:15:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:44,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:44,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:44,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:44,459 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1335589592, now seen corresponding path program 72 times [2021-06-05 06:15:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360651500] [2021-06-05 06:15:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:44,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:44,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360651500] [2021-06-05 06:15:44,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360651500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:44,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032083546] [2021-06-05 06:15:44,652 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:44,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:44,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:44,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:15:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:44,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:44,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:44,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:44,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:44,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:15:44,839 INFO L446 ElimStorePlain]: Different costs {0=[v_C_117], 2=[B]} [2021-06-05 06:15:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:44,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:44,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:44,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 06:15:44,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:44,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:44,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:44,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:63 [2021-06-05 06:15:45,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 06:15:45,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:45,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:45,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:45,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:45,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:45,053 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:15:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 06:15:45,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:45,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:45,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:45,133 INFO L628 ElimStorePlain]: treesize reduction 47, result has 61.2 percent of original size [2021-06-05 06:15:45,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:15:45,134 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:189, output treesize:88 [2021-06-05 06:15:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032083546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:45,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:45,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 06:15:45,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768911541] [2021-06-05 06:15:45,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:15:45,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:45,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:15:45,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:45,258 INFO L87 Difference]: Start difference. First operand 9350 states and 34567 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:46,157 INFO L93 Difference]: Finished difference Result 12198 states and 44126 transitions. [2021-06-05 06:15:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:46,178 INFO L225 Difference]: With dead ends: 12198 [2021-06-05 06:15:46,179 INFO L226 Difference]: Without dead ends: 12183 [2021-06-05 06:15:46,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2021-06-05 06:15:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 9336. [2021-06-05 06:15:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.7001606855918587) internal successors, (34541), 9335 states have internal predecessors, (34541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 34541 transitions. [2021-06-05 06:15:46,358 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 34541 transitions. Word has length 28 [2021-06-05 06:15:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:46,358 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 34541 transitions. [2021-06-05 06:15:46,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 34541 transitions. [2021-06-05 06:15:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:46,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:46,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:46,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:46,572 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1471768620, now seen corresponding path program 73 times [2021-06-05 06:15:46,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:46,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817522963] [2021-06-05 06:15:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:46,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817522963] [2021-06-05 06:15:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817522963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853591543] [2021-06-05 06:15:46,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:46,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:46,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:46,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:46,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 06:15:47,033 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_119], 2=[B]} [2021-06-05 06:15:47,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:47,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:47,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:15:47,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:47,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:47,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:47,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:47,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:47,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:47,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853591543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594189992] [2021-06-05 06:15:47,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:47,081 INFO L87 Difference]: Start difference. First operand 9336 states and 34541 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:47,579 INFO L93 Difference]: Finished difference Result 12007 states and 43570 transitions. [2021-06-05 06:15:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:47,600 INFO L225 Difference]: With dead ends: 12007 [2021-06-05 06:15:47,600 INFO L226 Difference]: Without dead ends: 11992 [2021-06-05 06:15:47,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11992 states. [2021-06-05 06:15:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11992 to 9366. [2021-06-05 06:15:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9366 states, 9365 states have (on average 3.6985584623598506) internal successors, (34637), 9365 states have internal predecessors, (34637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9366 states to 9366 states and 34637 transitions. [2021-06-05 06:15:47,761 INFO L78 Accepts]: Start accepts. Automaton has 9366 states and 34637 transitions. Word has length 28 [2021-06-05 06:15:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:47,761 INFO L482 AbstractCegarLoop]: Abstraction has 9366 states and 34637 transitions. [2021-06-05 06:15:47,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 9366 states and 34637 transitions. [2021-06-05 06:15:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:47,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:47,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:47,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:47,997 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:47,997 INFO L82 PathProgramCache]: Analyzing trace with hash -403894056, now seen corresponding path program 74 times [2021-06-05 06:15:47,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:47,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84765727] [2021-06-05 06:15:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:48,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84765727] [2021-06-05 06:15:48,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84765727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267677138] [2021-06-05 06:15:48,211 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:48,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:48,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:48,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-06-05 06:15:48,381 INFO L446 ElimStorePlain]: Different costs {0=[v_C_121], 2=[B]} [2021-06-05 06:15:48,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:48,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:48,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:15:48,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:48,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 06:15:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:48,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:48,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:48,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267677138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:48,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:48,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:48,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796255775] [2021-06-05 06:15:48,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:48,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:48,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:48,452 INFO L87 Difference]: Start difference. First operand 9366 states and 34637 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:48,960 INFO L93 Difference]: Finished difference Result 12078 states and 43780 transitions. [2021-06-05 06:15:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:48,982 INFO L225 Difference]: With dead ends: 12078 [2021-06-05 06:15:48,982 INFO L226 Difference]: Without dead ends: 12056 [2021-06-05 06:15:48,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:15:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-05 06:15:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 9373. [2021-06-05 06:15:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9373 states, 9372 states have (on average 3.698997012377294) internal successors, (34667), 9372 states have internal predecessors, (34667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9373 states to 9373 states and 34667 transitions. [2021-06-05 06:15:49,133 INFO L78 Accepts]: Start accepts. Automaton has 9373 states and 34667 transitions. Word has length 28 [2021-06-05 06:15:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:49,133 INFO L482 AbstractCegarLoop]: Abstraction has 9373 states and 34667 transitions. [2021-06-05 06:15:49,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9373 states and 34667 transitions. [2021-06-05 06:15:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:49,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:49,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:49,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:49,347 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2061160488, now seen corresponding path program 75 times [2021-06-05 06:15:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:49,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683658937] [2021-06-05 06:15:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:49,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:49,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683658937] [2021-06-05 06:15:49,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683658937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:49,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996214700] [2021-06-05 06:15:49,540 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:49,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:49,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:15:49,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:49,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:49,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:49,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:49,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-06-05 06:15:49,705 INFO L446 ElimStorePlain]: Different costs {0=[v_C_123], 3=[B]} [2021-06-05 06:15:49,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:49,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:49,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:49,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:49,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 06:15:49,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:49,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:49,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:49,768 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:64 [2021-06-05 06:15:50,084 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, v_prenex_17], 2=[A, v_prenex_18]} [2021-06-05 06:15:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:50,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:50,157 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.4 percent of original size [2021-06-05 06:15:50,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:15:50,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:50,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-06-05 06:15:50,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:50,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:50,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:50,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:50,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:50,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:15:50,261 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:126, output treesize:72 [2021-06-05 06:15:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996214700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:50,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:15:50,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593269595] [2021-06-05 06:15:50,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:15:50,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:15:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:15:50,435 INFO L87 Difference]: Start difference. First operand 9373 states and 34667 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,951 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 06:15:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:51,775 INFO L93 Difference]: Finished difference Result 12303 states and 44482 transitions. [2021-06-05 06:15:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 28 [2021-06-05 06:15:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:51,799 INFO L225 Difference]: With dead ends: 12303 [2021-06-05 06:15:51,799 INFO L226 Difference]: Without dead ends: 12288 [2021-06-05 06:15:51,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1218.7ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12288 states. [2021-06-05 06:15:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12288 to 9397. [2021-06-05 06:15:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9397 states, 9396 states have (on average 3.6978501489995743) internal successors, (34745), 9396 states have internal predecessors, (34745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9397 states to 9397 states and 34745 transitions. [2021-06-05 06:15:51,948 INFO L78 Accepts]: Start accepts. Automaton has 9397 states and 34745 transitions. Word has length 28 [2021-06-05 06:15:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:51,948 INFO L482 AbstractCegarLoop]: Abstraction has 9397 states and 34745 transitions. [2021-06-05 06:15:51,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9397 states and 34745 transitions. [2021-06-05 06:15:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:51,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:51,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:52,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 06:15:52,163 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2103940680, now seen corresponding path program 76 times [2021-06-05 06:15:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:52,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549587920] [2021-06-05 06:15:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549587920] [2021-06-05 06:15:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549587920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637419313] [2021-06-05 06:15:52,400 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:52,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:52,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:15:52,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:52,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:52,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:52,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:15:52,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:52,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:52,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:15:52,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:52,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:52,588 INFO L518 ElimStorePlain]: Eliminatee v_C_125 vanished before elimination [2021-06-05 06:15:52,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:52,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:15:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:52,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637419313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:52,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:52,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:52,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204150665] [2021-06-05 06:15:52,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:52,603 INFO L87 Difference]: Start difference. First operand 9397 states and 34745 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:53,322 INFO L93 Difference]: Finished difference Result 12054 states and 43712 transitions. [2021-06-05 06:15:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:53,343 INFO L225 Difference]: With dead ends: 12054 [2021-06-05 06:15:53,344 INFO L226 Difference]: Without dead ends: 12012 [2021-06-05 06:15:53,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 608.3ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12012 states. [2021-06-05 06:15:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12012 to 9422. [2021-06-05 06:15:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9422 states, 9421 states have (on average 3.6964228850440506) internal successors, (34824), 9421 states have internal predecessors, (34824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9422 states to 9422 states and 34824 transitions. [2021-06-05 06:15:53,493 INFO L78 Accepts]: Start accepts. Automaton has 9422 states and 34824 transitions. Word has length 28 [2021-06-05 06:15:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:53,493 INFO L482 AbstractCegarLoop]: Abstraction has 9422 states and 34824 transitions. [2021-06-05 06:15:53,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9422 states and 34824 transitions. [2021-06-05 06:15:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:53,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:53,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:53,708 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash 162628600, now seen corresponding path program 77 times [2021-06-05 06:15:53,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:53,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280365888] [2021-06-05 06:15:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:53,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:53,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280365888] [2021-06-05 06:15:53,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280365888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:53,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893248070] [2021-06-05 06:15:53,994 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:54,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:15:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:54,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:54,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:54,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:54,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 06:15:54,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:54,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:54,154 INFO L518 ElimStorePlain]: Eliminatee v_C_127 vanished before elimination [2021-06-05 06:15:54,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 06:15:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:15:54,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:54,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:54,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:15:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893248070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:54,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:54,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:15:54,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894012367] [2021-06-05 06:15:54,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:15:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:15:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:15:54,197 INFO L87 Difference]: Start difference. First operand 9422 states and 34824 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:54,585 INFO L93 Difference]: Finished difference Result 9555 states and 35217 transitions. [2021-06-05 06:15:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:15:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:54,606 INFO L225 Difference]: With dead ends: 9555 [2021-06-05 06:15:54,607 INFO L226 Difference]: Without dead ends: 9540 [2021-06-05 06:15:54,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2021-06-05 06:15:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 9410. [2021-06-05 06:15:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9410 states, 9409 states have (on average 3.697736210011691) internal successors, (34792), 9409 states have internal predecessors, (34792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 34792 transitions. [2021-06-05 06:15:54,828 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 34792 transitions. Word has length 28 [2021-06-05 06:15:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:54,828 INFO L482 AbstractCegarLoop]: Abstraction has 9410 states and 34792 transitions. [2021-06-05 06:15:54,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 34792 transitions. [2021-06-05 06:15:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:54,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:54,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:55,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:55,042 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1982693332, now seen corresponding path program 78 times [2021-06-05 06:15:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:55,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453211902] [2021-06-05 06:15:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:55,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453211902] [2021-06-05 06:15:55,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453211902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641349628] [2021-06-05 06:15:55,297 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:55,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:15:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:55,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:15:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:55,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:55,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 06:15:55,622 INFO L446 ElimStorePlain]: Different costs {0=[v_C_129], 2=[A], 3=[B]} [2021-06-05 06:15:55,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:55,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,666 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.7 percent of original size [2021-06-05 06:15:55,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 06:15:55,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:55,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:55,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 06:15:55,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:15:55,808 INFO L628 ElimStorePlain]: treesize reduction 129, result has 28.7 percent of original size [2021-06-05 06:15:55,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:73, output treesize:81 [2021-06-05 06:15:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641349628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:55,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:55,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:15:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319650576] [2021-06-05 06:15:55,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:15:55,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:55,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:15:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:15:55,892 INFO L87 Difference]: Start difference. First operand 9410 states and 34792 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:57,050 INFO L93 Difference]: Finished difference Result 12166 states and 43946 transitions. [2021-06-05 06:15:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:15:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 28 [2021-06-05 06:15:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:57,073 INFO L225 Difference]: With dead ends: 12166 [2021-06-05 06:15:57,073 INFO L226 Difference]: Without dead ends: 12037 [2021-06-05 06:15:57,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:15:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12037 states. [2021-06-05 06:15:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12037 to 9451. [2021-06-05 06:15:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9451 states, 9450 states have (on average 3.693650793650794) internal successors, (34905), 9450 states have internal predecessors, (34905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9451 states to 9451 states and 34905 transitions. [2021-06-05 06:15:57,224 INFO L78 Accepts]: Start accepts. Automaton has 9451 states and 34905 transitions. Word has length 28 [2021-06-05 06:15:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:57,224 INFO L482 AbstractCegarLoop]: Abstraction has 9451 states and 34905 transitions. [2021-06-05 06:15:57,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9451 states and 34905 transitions. [2021-06-05 06:15:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:57,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:57,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:57,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,439 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1821506156, now seen corresponding path program 79 times [2021-06-05 06:15:57,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:57,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053343750] [2021-06-05 06:15:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:57,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:57,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053343750] [2021-06-05 06:15:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053343750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452008956] [2021-06-05 06:15:57,700 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:57,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:57,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:57,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:57,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:57,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:15:57,890 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_131], 2=[B]} [2021-06-05 06:15:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:15:57,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:57,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:57,903 INFO L518 ElimStorePlain]: Eliminatee v_C_131 vanished before elimination [2021-06-05 06:15:57,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:57,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:57,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:15:57,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:57,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:57,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:57,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:15:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:57,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452008956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166583376] [2021-06-05 06:15:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:57,933 INFO L87 Difference]: Start difference. First operand 9451 states and 34905 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:58,694 INFO L93 Difference]: Finished difference Result 13163 states and 47420 transitions. [2021-06-05 06:15:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:58,725 INFO L225 Difference]: With dead ends: 13163 [2021-06-05 06:15:58,725 INFO L226 Difference]: Without dead ends: 13095 [2021-06-05 06:15:58,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:15:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-05 06:15:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 9433. [2021-06-05 06:15:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9432 states have (on average 3.695186598812553) internal successors, (34853), 9432 states have internal predecessors, (34853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 34853 transitions. [2021-06-05 06:15:58,887 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 34853 transitions. Word has length 28 [2021-06-05 06:15:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:58,887 INFO L482 AbstractCegarLoop]: Abstraction has 9433 states and 34853 transitions. [2021-06-05 06:15:58,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 34853 transitions. [2021-06-05 06:15:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:58,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:58,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:59,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:59,101 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2113657688, now seen corresponding path program 80 times [2021-06-05 06:15:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:59,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707800447] [2021-06-05 06:15:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707800447] [2021-06-05 06:15:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707800447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120023852] [2021-06-05 06:15:59,471 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:59,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:59,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:59,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:15:59,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:15:59,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:59,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:15:59,628 INFO L446 ElimStorePlain]: Different costs {0=[v_C_133], 2=[B]} [2021-06-05 06:15:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:15:59,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:15:59,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:59,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:15:59,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:59,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 06:15:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:15:59,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:59,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:59,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:15:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120023852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:59,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:59,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:15:59,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865917139] [2021-06-05 06:15:59,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:59,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:59,705 INFO L87 Difference]: Start difference. First operand 9433 states and 34853 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:00,195 INFO L93 Difference]: Finished difference Result 12075 states and 43753 transitions. [2021-06-05 06:16:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:00,216 INFO L225 Difference]: With dead ends: 12075 [2021-06-05 06:16:00,216 INFO L226 Difference]: Without dead ends: 12036 [2021-06-05 06:16:00,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12036 states. [2021-06-05 06:16:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12036 to 9428. [2021-06-05 06:16:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.696403946112231) internal successors, (34846), 9427 states have internal predecessors, (34846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 34846 transitions. [2021-06-05 06:16:00,351 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 34846 transitions. Word has length 28 [2021-06-05 06:16:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:00,351 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 34846 transitions. [2021-06-05 06:16:00,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 34846 transitions. [2021-06-05 06:16:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:00,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:00,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 06:16:00,565 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1579622776, now seen corresponding path program 81 times [2021-06-05 06:16:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610982526] [2021-06-05 06:16:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:00,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610982526] [2021-06-05 06:16:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610982526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115052982] [2021-06-05 06:16:00,857 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:00,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:00,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:00,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:16:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:00,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:00,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:00,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:00,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:00,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 06:16:01,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:01,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:01,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:01,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:01,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:43 [2021-06-05 06:16:01,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:01,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 06:16:01,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:01,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:01,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:01,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:74 [2021-06-05 06:16:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:01,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:01,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:16:01,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:01,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:01,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:01,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:16:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:01,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115052982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:01,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:01,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:16:01,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630548812] [2021-06-05 06:16:01,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:16:01,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:16:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:01,232 INFO L87 Difference]: Start difference. First operand 9428 states and 34846 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:01,776 INFO L93 Difference]: Finished difference Result 9532 states and 35120 transitions. [2021-06-05 06:16:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:16:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:01,793 INFO L225 Difference]: With dead ends: 9532 [2021-06-05 06:16:01,793 INFO L226 Difference]: Without dead ends: 9510 [2021-06-05 06:16:01,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:16:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2021-06-05 06:16:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 9445. [2021-06-05 06:16:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.6954680220245657) internal successors, (34900), 9444 states have internal predecessors, (34900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 34900 transitions. [2021-06-05 06:16:01,913 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 34900 transitions. Word has length 28 [2021-06-05 06:16:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:01,913 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 34900 transitions. [2021-06-05 06:16:01,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 34900 transitions. [2021-06-05 06:16:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:01,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:01,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:02,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:02,126 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -37910004, now seen corresponding path program 82 times [2021-06-05 06:16:02,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:02,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406819152] [2021-06-05 06:16:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:02,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:02,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406819152] [2021-06-05 06:16:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406819152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:02,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270210281] [2021-06-05 06:16:02,353 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:02,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:02,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:02,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:02,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:02,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:02,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 06:16:02,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:02,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:02,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-06-05 06:16:02,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:02,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:02,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 06:16:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:16:02,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:02,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:02,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:16:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270210281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:02,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:02,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:02,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638341633] [2021-06-05 06:16:02,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:02,577 INFO L87 Difference]: Start difference. First operand 9445 states and 34900 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:02,937 INFO L93 Difference]: Finished difference Result 9627 states and 35407 transitions. [2021-06-05 06:16:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 28 [2021-06-05 06:16:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:02,954 INFO L225 Difference]: With dead ends: 9627 [2021-06-05 06:16:02,954 INFO L226 Difference]: Without dead ends: 9605 [2021-06-05 06:16:02,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-05 06:16:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 9443. [2021-06-05 06:16:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.696038974793476) internal successors, (34898), 9442 states have internal predecessors, (34898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 34898 transitions. [2021-06-05 06:16:03,087 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 34898 transitions. Word has length 28 [2021-06-05 06:16:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 9443 states and 34898 transitions. [2021-06-05 06:16:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 34898 transitions. [2021-06-05 06:16:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:03,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:03,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:03,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 06:16:03,365 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1727852908, now seen corresponding path program 83 times [2021-06-05 06:16:03,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:03,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614417010] [2021-06-05 06:16:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:03,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:03,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614417010] [2021-06-05 06:16:03,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614417010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:03,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644257773] [2021-06-05 06:16:03,592 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:03,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:03,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:03,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:03,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 06:16:03,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:03,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:03,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-06-05 06:16:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:03,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 06:16:03,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:03,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:37 [2021-06-05 06:16:03,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:16:03,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:03,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:03,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:16:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644257773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:03,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:03,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346987404] [2021-06-05 06:16:03,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:03,821 INFO L87 Difference]: Start difference. First operand 9443 states and 34898 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:04,103 INFO L93 Difference]: Finished difference Result 9589 states and 35291 transitions. [2021-06-05 06:16:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 28 [2021-06-05 06:16:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:04,120 INFO L225 Difference]: With dead ends: 9589 [2021-06-05 06:16:04,120 INFO L226 Difference]: Without dead ends: 9552 [2021-06-05 06:16:04,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9552 states. [2021-06-05 06:16:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9552 to 9442. [2021-06-05 06:16:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 3.6972778307382694) internal successors, (34906), 9441 states have internal predecessors, (34906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 34906 transitions. [2021-06-05 06:16:04,245 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 34906 transitions. Word has length 28 [2021-06-05 06:16:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:04,245 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 34906 transitions. [2021-06-05 06:16:04,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 34906 transitions. [2021-06-05 06:16:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:04,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:04,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:04,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:04,459 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1624520208, now seen corresponding path program 84 times [2021-06-05 06:16:04,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:04,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292075036] [2021-06-05 06:16:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:04,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292075036] [2021-06-05 06:16:04,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292075036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548331114] [2021-06-05 06:16:04,676 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:04,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:16:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:04,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:04,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:04,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:04,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:04,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 06:16:04,899 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_141], 2=[B]} [2021-06-05 06:16:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:04,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:04,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:04,909 INFO L518 ElimStorePlain]: Eliminatee v_C_141 vanished before elimination [2021-06-05 06:16:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:04,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:16:04,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:04,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:04,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:04,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 06:16:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:04,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548331114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:04,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:04,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:04,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194139218] [2021-06-05 06:16:04,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:04,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:04,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:04,934 INFO L87 Difference]: Start difference. First operand 9442 states and 34906 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:05,473 INFO L93 Difference]: Finished difference Result 12096 states and 43869 transitions. [2021-06-05 06:16:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:05,494 INFO L225 Difference]: With dead ends: 12096 [2021-06-05 06:16:05,495 INFO L226 Difference]: Without dead ends: 12054 [2021-06-05 06:16:05,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-05 06:16:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 9468. [2021-06-05 06:16:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9468 states, 9467 states have (on average 3.695785359670434) internal successors, (34988), 9467 states have internal predecessors, (34988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9468 states to 9468 states and 34988 transitions. [2021-06-05 06:16:05,638 INFO L78 Accepts]: Start accepts. Automaton has 9468 states and 34988 transitions. Word has length 28 [2021-06-05 06:16:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:05,639 INFO L482 AbstractCegarLoop]: Abstraction has 9468 states and 34988 transitions. [2021-06-05 06:16:05,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9468 states and 34988 transitions. [2021-06-05 06:16:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:05,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:05,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:05,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 06:16:05,852 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1755484564, now seen corresponding path program 85 times [2021-06-05 06:16:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716273388] [2021-06-05 06:16:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:06,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716273388] [2021-06-05 06:16:06,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716273388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316034536] [2021-06-05 06:16:06,062 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:06,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:06,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 06:16:06,230 INFO L446 ElimStorePlain]: Different costs {0=[v_C_143], 2=[B]} [2021-06-05 06:16:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:06,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:06,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:16:06,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:06,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 06:16:06,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:16:06,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:06,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:06,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:16:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316034536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:06,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:06,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:06,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710904106] [2021-06-05 06:16:06,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:06,303 INFO L87 Difference]: Start difference. First operand 9468 states and 34988 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:06,809 INFO L93 Difference]: Finished difference Result 12147 states and 44003 transitions. [2021-06-05 06:16:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:16:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:06,830 INFO L225 Difference]: With dead ends: 12147 [2021-06-05 06:16:06,830 INFO L226 Difference]: Without dead ends: 12116 [2021-06-05 06:16:06,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2021-06-05 06:16:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 9463. [2021-06-05 06:16:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9463 states, 9462 states have (on average 3.6972098922003807) internal successors, (34983), 9462 states have internal predecessors, (34983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9463 states to 9463 states and 34983 transitions. [2021-06-05 06:16:07,035 INFO L78 Accepts]: Start accepts. Automaton has 9463 states and 34983 transitions. Word has length 28 [2021-06-05 06:16:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:07,035 INFO L482 AbstractCegarLoop]: Abstraction has 9463 states and 34983 transitions. [2021-06-05 06:16:07,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 9463 states and 34983 transitions. [2021-06-05 06:16:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:07,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:07,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:07,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 06:16:07,250 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash -194926700, now seen corresponding path program 86 times [2021-06-05 06:16:07,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:07,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454978246] [2021-06-05 06:16:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:07,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454978246] [2021-06-05 06:16:07,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454978246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400278129] [2021-06-05 06:16:07,472 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:07,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:07,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:07,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:07,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:07,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 06:16:07,623 INFO L446 ElimStorePlain]: Different costs {0=[v_C_145], 2=[B]} [2021-06-05 06:16:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:07,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:07,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:07,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:07,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:16:07,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:07,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:27 [2021-06-05 06:16:07,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:16:07,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:07,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:07,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:16:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400278129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:07,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:07,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692345077] [2021-06-05 06:16:07,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:07,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:07,715 INFO L87 Difference]: Start difference. First operand 9463 states and 34983 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:08,260 INFO L93 Difference]: Finished difference Result 12168 states and 44090 transitions. [2021-06-05 06:16:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:16:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:08,282 INFO L225 Difference]: With dead ends: 12168 [2021-06-05 06:16:08,282 INFO L226 Difference]: Without dead ends: 12140 [2021-06-05 06:16:08,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12140 states. [2021-06-05 06:16:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12140 to 9475. [2021-06-05 06:16:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9475 states, 9474 states have (on average 3.696748997255647) internal successors, (35023), 9474 states have internal predecessors, (35023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 35023 transitions. [2021-06-05 06:16:08,424 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 35023 transitions. Word has length 28 [2021-06-05 06:16:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 9475 states and 35023 transitions. [2021-06-05 06:16:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 35023 transitions. [2021-06-05 06:16:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:08,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:08,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:08,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:08,640 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash 604414584, now seen corresponding path program 87 times [2021-06-05 06:16:08,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:08,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012554781] [2021-06-05 06:16:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:08,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012554781] [2021-06-05 06:16:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012554781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933720650] [2021-06-05 06:16:08,848 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:08,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:08,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:08,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:16:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:08,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:08,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:08,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:08,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:08,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 06:16:08,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:08,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:08,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:08,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:08,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:51 [2021-06-05 06:16:09,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 06:16:09,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:09,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:09,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:09,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:74 [2021-06-05 06:16:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:09,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:16:09,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:09,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:09,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:09,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:16:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:09,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933720650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:09,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:09,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:16:09,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054054367] [2021-06-05 06:16:09,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:16:09,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:16:09,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:09,152 INFO L87 Difference]: Start difference. First operand 9475 states and 35023 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:09,628 INFO L93 Difference]: Finished difference Result 9586 states and 35334 transitions. [2021-06-05 06:16:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:16:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:09,645 INFO L225 Difference]: With dead ends: 9586 [2021-06-05 06:16:09,645 INFO L226 Difference]: Without dead ends: 9571 [2021-06-05 06:16:09,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:16:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9571 states. [2021-06-05 06:16:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9571 to 9494. [2021-06-05 06:16:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.695670494048246) internal successors, (35083), 9493 states have internal predecessors, (35083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 35083 transitions. [2021-06-05 06:16:09,789 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 35083 transitions. Word has length 28 [2021-06-05 06:16:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:09,789 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 35083 transitions. [2021-06-05 06:16:09,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 35083 transitions. [2021-06-05 06:16:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:09,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:09,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:10,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:10,004 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1013118196, now seen corresponding path program 88 times [2021-06-05 06:16:10,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:10,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200599554] [2021-06-05 06:16:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200599554] [2021-06-05 06:16:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200599554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979814156] [2021-06-05 06:16:10,223 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:10,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:10,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:10,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 06:16:10,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:10,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:10,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 06:16:10,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:10,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:10,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 06:16:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:10,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:10,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:16:10,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:10,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:10,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 06:16:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979814156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:10,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140298830] [2021-06-05 06:16:10,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:10,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:10,463 INFO L87 Difference]: Start difference. First operand 9494 states and 35083 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:10,929 INFO L93 Difference]: Finished difference Result 9693 states and 35665 transitions. [2021-06-05 06:16:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 28 [2021-06-05 06:16:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:10,946 INFO L225 Difference]: With dead ends: 9693 [2021-06-05 06:16:10,946 INFO L226 Difference]: Without dead ends: 9678 [2021-06-05 06:16:10,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2021-06-05 06:16:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 9499. [2021-06-05 06:16:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 3.6949884186144453) internal successors, (35095), 9498 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 35095 transitions. [2021-06-05 06:16:11,116 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 35095 transitions. Word has length 28 [2021-06-05 06:16:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:11,116 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 35095 transitions. [2021-06-05 06:16:11,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 35095 transitions. [2021-06-05 06:16:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:11,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:11,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:11,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 06:16:11,333 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1591906196, now seen corresponding path program 89 times [2021-06-05 06:16:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:11,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860378782] [2021-06-05 06:16:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:11,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860378782] [2021-06-05 06:16:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860378782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192304465] [2021-06-05 06:16:11,556 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:11,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:11,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:16:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:11,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:11,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 06:16:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:11,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:11,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 06:16:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:11,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:11,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:16:11,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:11,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-06-05 06:16:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:16:11,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:11,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:11,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:16:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192304465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:11,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:11,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:11,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184156841] [2021-06-05 06:16:11,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:11,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:11,787 INFO L87 Difference]: Start difference. First operand 9499 states and 35095 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:12,181 INFO L93 Difference]: Finished difference Result 9645 states and 35504 transitions. [2021-06-05 06:16:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 28 [2021-06-05 06:16:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:12,199 INFO L225 Difference]: With dead ends: 9645 [2021-06-05 06:16:12,199 INFO L226 Difference]: Without dead ends: 9620 [2021-06-05 06:16:12,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9620 states. [2021-06-05 06:16:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9620 to 9494. [2021-06-05 06:16:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.6965132202675655) internal successors, (35091), 9493 states have internal predecessors, (35091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 35091 transitions. [2021-06-05 06:16:12,337 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 35091 transitions. Word has length 28 [2021-06-05 06:16:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:12,337 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 35091 transitions. [2021-06-05 06:16:12,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 35091 transitions. [2021-06-05 06:16:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:12,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:12,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:12,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 06:16:12,551 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -218520368, now seen corresponding path program 90 times [2021-06-05 06:16:12,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:12,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361509264] [2021-06-05 06:16:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:12,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:12,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361509264] [2021-06-05 06:16:12,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361509264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:12,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459197734] [2021-06-05 06:16:12,803 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:12,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:12,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:12,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:12,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 06:16:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:12,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:12,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 06:16:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:12,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 06:16:12,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:12,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:31 [2021-06-05 06:16:13,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:16:13,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:13,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:13,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:13,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 06:16:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:13,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459197734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:13,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:13,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:16:13,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102043989] [2021-06-05 06:16:13,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:16:13,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:16:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:16:13,051 INFO L87 Difference]: Start difference. First operand 9494 states and 35091 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:13,469 INFO L93 Difference]: Finished difference Result 9647 states and 35544 transitions. [2021-06-05 06:16:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:16:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 28 [2021-06-05 06:16:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:13,486 INFO L225 Difference]: With dead ends: 9647 [2021-06-05 06:16:13,486 INFO L226 Difference]: Without dead ends: 9632 [2021-06-05 06:16:13,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:16:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-06-05 06:16:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 9502. [2021-06-05 06:16:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.6969792653404903) internal successors, (35125), 9501 states have internal predecessors, (35125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 35125 transitions. [2021-06-05 06:16:13,616 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 35125 transitions. Word has length 28 [2021-06-05 06:16:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:13,616 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 35125 transitions. [2021-06-05 06:16:13,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 35125 transitions. [2021-06-05 06:16:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:13,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:13,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:13,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:13,830 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 618524472, now seen corresponding path program 91 times [2021-06-05 06:16:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584041222] [2021-06-05 06:16:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:13,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:13,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584041222] [2021-06-05 06:16:13,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584041222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:13,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146666092] [2021-06-05 06:16:13,980 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:14,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:14,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:14,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:14,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:14,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:14,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:14,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:14,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:14,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:16:14,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:14,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:14,201 INFO L518 ElimStorePlain]: Eliminatee v_C_155 vanished before elimination [2021-06-05 06:16:14,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:14,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 06:16:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:14,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146666092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:14,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:14,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:14,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865496730] [2021-06-05 06:16:14,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:14,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:14,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:14,218 INFO L87 Difference]: Start difference. First operand 9502 states and 35125 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:15,468 INFO L93 Difference]: Finished difference Result 10930 states and 39178 transitions. [2021-06-05 06:16:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:16:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:15,485 INFO L225 Difference]: With dead ends: 10930 [2021-06-05 06:16:15,485 INFO L226 Difference]: Without dead ends: 10915 [2021-06-05 06:16:15,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2021-06-05 06:16:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 9577. [2021-06-05 06:16:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9577 states, 9576 states have (on average 3.6940267335004178) internal successors, (35374), 9576 states have internal predecessors, (35374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9577 states to 9577 states and 35374 transitions. [2021-06-05 06:16:15,623 INFO L78 Accepts]: Start accepts. Automaton has 9577 states and 35374 transitions. Word has length 28 [2021-06-05 06:16:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:15,623 INFO L482 AbstractCegarLoop]: Abstraction has 9577 states and 35374 transitions. [2021-06-05 06:16:15,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9577 states and 35374 transitions. [2021-06-05 06:16:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:15,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:15,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:15,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 06:16:15,836 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1409873544, now seen corresponding path program 92 times [2021-06-05 06:16:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:15,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009203394] [2021-06-05 06:16:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:16,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:16,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009203394] [2021-06-05 06:16:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009203394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:16,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215852987] [2021-06-05 06:16:16,045 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:16,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:16,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:16,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:16:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:16,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:16,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:16,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:16,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:16,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:16,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:16,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:16,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:16,304 INFO L518 ElimStorePlain]: Eliminatee v_C_157 vanished before elimination [2021-06-05 06:16:16,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:16,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 06:16:16,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:16,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 06:16:16,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:16,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:16,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:16,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 06:16:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215852987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:16,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:16,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:16:16,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117116991] [2021-06-05 06:16:16,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:16,431 INFO L87 Difference]: Start difference. First operand 9577 states and 35374 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:18,642 INFO L93 Difference]: Finished difference Result 11439 states and 40569 transitions. [2021-06-05 06:16:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:16:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-06-05 06:16:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:18,663 INFO L225 Difference]: With dead ends: 11439 [2021-06-05 06:16:18,663 INFO L226 Difference]: Without dead ends: 11331 [2021-06-05 06:16:18,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1764.9ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:16:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11331 states. [2021-06-05 06:16:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11331 to 9640. [2021-06-05 06:16:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9640 states, 9639 states have (on average 3.691358024691358) internal successors, (35581), 9639 states have internal predecessors, (35581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9640 states to 9640 states and 35581 transitions. [2021-06-05 06:16:18,814 INFO L78 Accepts]: Start accepts. Automaton has 9640 states and 35581 transitions. Word has length 28 [2021-06-05 06:16:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:18,814 INFO L482 AbstractCegarLoop]: Abstraction has 9640 states and 35581 transitions. [2021-06-05 06:16:18,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9640 states and 35581 transitions. [2021-06-05 06:16:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:18,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:18,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:19,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:19,028 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash -744166792, now seen corresponding path program 93 times [2021-06-05 06:16:19,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:19,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983825497] [2021-06-05 06:16:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:19,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983825497] [2021-06-05 06:16:19,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983825497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853704593] [2021-06-05 06:16:19,226 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:19,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:19,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:19,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:19,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:19,380 INFO L446 ElimStorePlain]: Different costs {0=[v_C_159], 1=[A]} [2021-06-05 06:16:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:19,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:19,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 06:16:19,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:19,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-06-05 06:16:19,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:19,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:19,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:19,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:19,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853704593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:19,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:19,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:19,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726461148] [2021-06-05 06:16:19,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:19,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:19,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:19,461 INFO L87 Difference]: Start difference. First operand 9640 states and 35581 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:20,703 INFO L93 Difference]: Finished difference Result 10911 states and 39246 transitions. [2021-06-05 06:16:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:16:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:20,722 INFO L225 Difference]: With dead ends: 10911 [2021-06-05 06:16:20,723 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 06:16:20,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:16:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 06:16:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9663. [2021-06-05 06:16:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9663 states, 9662 states have (on average 3.6912647484992753) internal successors, (35665), 9662 states have internal predecessors, (35665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 35665 transitions. [2021-06-05 06:16:20,861 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 35665 transitions. Word has length 28 [2021-06-05 06:16:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:20,862 INFO L482 AbstractCegarLoop]: Abstraction has 9663 states and 35665 transitions. [2021-06-05 06:16:20,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 35665 transitions. [2021-06-05 06:16:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:20,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:20,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:21,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 06:16:21,075 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2021265836, now seen corresponding path program 94 times [2021-06-05 06:16:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:21,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426910807] [2021-06-05 06:16:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:21,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426910807] [2021-06-05 06:16:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426910807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:21,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353272084] [2021-06-05 06:16:21,253 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:21,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:21,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:21,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:21,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:21,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:21,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:21,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:21,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:16:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353272084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:21,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:21,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:21,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989746164] [2021-06-05 06:16:21,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:21,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:21,488 INFO L87 Difference]: Start difference. First operand 9663 states and 35665 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:22,411 INFO L93 Difference]: Finished difference Result 11554 states and 41074 transitions. [2021-06-05 06:16:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:16:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:22,430 INFO L225 Difference]: With dead ends: 11554 [2021-06-05 06:16:22,430 INFO L226 Difference]: Without dead ends: 11529 [2021-06-05 06:16:22,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11529 states. [2021-06-05 06:16:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11529 to 9689. [2021-06-05 06:16:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 9688 states have (on average 3.690132122213047) internal successors, (35750), 9688 states have internal predecessors, (35750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 35750 transitions. [2021-06-05 06:16:22,580 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 35750 transitions. Word has length 28 [2021-06-05 06:16:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:22,580 INFO L482 AbstractCegarLoop]: Abstraction has 9689 states and 35750 transitions. [2021-06-05 06:16:22,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 35750 transitions. [2021-06-05 06:16:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:22,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:22,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:22,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 06:16:22,795 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash 245303444, now seen corresponding path program 95 times [2021-06-05 06:16:22,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:22,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085849977] [2021-06-05 06:16:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:22,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:22,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085849977] [2021-06-05 06:16:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085849977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:22,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530098207] [2021-06-05 06:16:22,999 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:23,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:23,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:23,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:23,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 06:16:23,179 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:16:23,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:23,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 06:16:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:23,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:23,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:23,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:23,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530098207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:23,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:23,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:23,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560478794] [2021-06-05 06:16:23,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:23,225 INFO L87 Difference]: Start difference. First operand 9689 states and 35750 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:23,673 INFO L93 Difference]: Finished difference Result 11327 states and 40556 transitions. [2021-06-05 06:16:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:23,690 INFO L225 Difference]: With dead ends: 11327 [2021-06-05 06:16:23,691 INFO L226 Difference]: Without dead ends: 11257 [2021-06-05 06:16:23,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-06-05 06:16:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 9680. [2021-06-05 06:16:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9680 states, 9679 states have (on average 3.69160037193925) internal successors, (35731), 9679 states have internal predecessors, (35731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9680 states to 9680 states and 35731 transitions. [2021-06-05 06:16:23,830 INFO L78 Accepts]: Start accepts. Automaton has 9680 states and 35731 transitions. Word has length 28 [2021-06-05 06:16:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:23,830 INFO L482 AbstractCegarLoop]: Abstraction has 9680 states and 35731 transitions. [2021-06-05 06:16:23,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9680 states and 35731 transitions. [2021-06-05 06:16:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:23,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:23,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:24,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 06:16:24,044 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1181237460, now seen corresponding path program 96 times [2021-06-05 06:16:24,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:24,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547543202] [2021-06-05 06:16:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:24,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:24,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547543202] [2021-06-05 06:16:24,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547543202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:24,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240330736] [2021-06-05 06:16:24,308 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:24,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:24,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:24,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:24,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:24,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:24,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:24,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:24,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:24,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:24,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:16:24,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:24,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:24,565 INFO L518 ElimStorePlain]: Eliminatee v_C_165 vanished before elimination [2021-06-05 06:16:24,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:24,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:16:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:24,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240330736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:24,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:24,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:24,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912376393] [2021-06-05 06:16:24,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:24,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:24,581 INFO L87 Difference]: Start difference. First operand 9680 states and 35731 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:25,053 INFO L93 Difference]: Finished difference Result 10476 states and 38006 transitions. [2021-06-05 06:16:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:16:25,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:25,071 INFO L225 Difference]: With dead ends: 10476 [2021-06-05 06:16:25,071 INFO L226 Difference]: Without dead ends: 10461 [2021-06-05 06:16:25,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10461 states. [2021-06-05 06:16:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10461 to 9695. [2021-06-05 06:16:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9695 states, 9694 states have (on average 3.6912523210233132) internal successors, (35783), 9694 states have internal predecessors, (35783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9695 states to 9695 states and 35783 transitions. [2021-06-05 06:16:25,215 INFO L78 Accepts]: Start accepts. Automaton has 9695 states and 35783 transitions. Word has length 28 [2021-06-05 06:16:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:25,216 INFO L482 AbstractCegarLoop]: Abstraction has 9695 states and 35783 transitions. [2021-06-05 06:16:25,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9695 states and 35783 transitions. [2021-06-05 06:16:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:25,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:25,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:25,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:25,431 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:25,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1312201816, now seen corresponding path program 97 times [2021-06-05 06:16:25,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:25,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302207690] [2021-06-05 06:16:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:25,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:25,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302207690] [2021-06-05 06:16:25,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302207690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:25,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339568669] [2021-06-05 06:16:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:25,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:25,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:25,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:25,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:25,789 INFO L446 ElimStorePlain]: Different costs {0=[v_C_167], 6=[B]} [2021-06-05 06:16:25,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 126 [2021-06-05 06:16:25,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,818 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 06:16:25,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 151 [2021-06-05 06:16:25,821 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:27 [2021-06-05 06:16:25,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:25,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:25,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339568669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:25,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:25,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:25,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440113922] [2021-06-05 06:16:25,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:25,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:25,873 INFO L87 Difference]: Start difference. First operand 9695 states and 35783 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:26,499 INFO L93 Difference]: Finished difference Result 10918 states and 39241 transitions. [2021-06-05 06:16:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:16:26,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:26,517 INFO L225 Difference]: With dead ends: 10918 [2021-06-05 06:16:26,517 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 06:16:26,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:16:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 06:16:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9718. [2021-06-05 06:16:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9718 states, 9717 states have (on average 3.6923947720489863) internal successors, (35879), 9717 states have internal predecessors, (35879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9718 states to 9718 states and 35879 transitions. [2021-06-05 06:16:26,654 INFO L78 Accepts]: Start accepts. Automaton has 9718 states and 35879 transitions. Word has length 28 [2021-06-05 06:16:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:26,654 INFO L482 AbstractCegarLoop]: Abstraction has 9718 states and 35879 transitions. [2021-06-05 06:16:26,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 9718 states and 35879 transitions. [2021-06-05 06:16:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:26,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:26,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:26,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 06:16:26,868 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash 778166904, now seen corresponding path program 98 times [2021-06-05 06:16:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:26,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814983079] [2021-06-05 06:16:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:27,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:27,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814983079] [2021-06-05 06:16:27,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814983079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:27,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833963377] [2021-06-05 06:16:27,061 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:27,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:27,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:27,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:27,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:27,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:27,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2021-06-05 06:16:27,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:27,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:27,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 06:16:27,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:27,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:27,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:27,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833963377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:27,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:27,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941974303] [2021-06-05 06:16:27,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:27,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:27,323 INFO L87 Difference]: Start difference. First operand 9718 states and 35879 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:27,760 INFO L93 Difference]: Finished difference Result 12371 states and 44835 transitions. [2021-06-05 06:16:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:16:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:27,782 INFO L225 Difference]: With dead ends: 12371 [2021-06-05 06:16:27,782 INFO L226 Difference]: Without dead ends: 12310 [2021-06-05 06:16:27,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-06-05 06:16:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 9729. [2021-06-05 06:16:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9729 states, 9728 states have (on average 3.6907894736842106) internal successors, (35904), 9728 states have internal predecessors, (35904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 35904 transitions. [2021-06-05 06:16:28,007 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 35904 transitions. Word has length 28 [2021-06-05 06:16:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:28,008 INFO L482 AbstractCegarLoop]: Abstraction has 9729 states and 35904 transitions. [2021-06-05 06:16:28,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 35904 transitions. [2021-06-05 06:16:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:28,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:28,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:28,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:28,223 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1765658516, now seen corresponding path program 99 times [2021-06-05 06:16:28,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:28,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085105316] [2021-06-05 06:16:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:28,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085105316] [2021-06-05 06:16:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085105316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995643697] [2021-06-05 06:16:28,394 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:28,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:28,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:28,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:16:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:28,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:28,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:28,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:28,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2021-06-05 06:16:28,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 06:16:28,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:28,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:28,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:108 [2021-06-05 06:16:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:28,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:28,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:28,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:28,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:28,789 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 06:16:28,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:16:28,790 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-06-05 06:16:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995643697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:28,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:16:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387816458] [2021-06-05 06:16:28,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:28,893 INFO L87 Difference]: Start difference. First operand 9729 states and 35904 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:30,113 INFO L93 Difference]: Finished difference Result 12529 states and 45304 transitions. [2021-06-05 06:16:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:16:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-06-05 06:16:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:30,137 INFO L225 Difference]: With dead ends: 12529 [2021-06-05 06:16:30,137 INFO L226 Difference]: Without dead ends: 12498 [2021-06-05 06:16:30,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 989.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:16:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-06-05 06:16:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 9726. [2021-06-05 06:16:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 9725 states have (on average 3.692236503856041) internal successors, (35907), 9725 states have internal predecessors, (35907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 35907 transitions. [2021-06-05 06:16:30,288 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 35907 transitions. Word has length 28 [2021-06-05 06:16:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:30,288 INFO L482 AbstractCegarLoop]: Abstraction has 9726 states and 35907 transitions. [2021-06-05 06:16:30,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 35907 transitions. [2021-06-05 06:16:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:30,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:30,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:30,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:30,519 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash -517396488, now seen corresponding path program 100 times [2021-06-05 06:16:30,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:30,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252621588] [2021-06-05 06:16:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:30,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:30,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252621588] [2021-06-05 06:16:30,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252621588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:30,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579367509] [2021-06-05 06:16:30,678 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:30,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:30,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:30,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:30,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:30,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:30,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:30,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:30 [2021-06-05 06:16:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:30,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:30,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-05 06:16:30,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:30,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:30,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:30,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:30,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579367509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:30,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:30,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369613945] [2021-06-05 06:16:30,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:30,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:30,910 INFO L87 Difference]: Start difference. First operand 9726 states and 35907 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:31,632 INFO L93 Difference]: Finished difference Result 12479 states and 45190 transitions. [2021-06-05 06:16:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:31,654 INFO L225 Difference]: With dead ends: 12479 [2021-06-05 06:16:31,654 INFO L226 Difference]: Without dead ends: 12457 [2021-06-05 06:16:31,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2021-06-05 06:16:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 9742. [2021-06-05 06:16:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9742 states, 9741 states have (on average 3.691920747356534) internal successors, (35963), 9741 states have internal predecessors, (35963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9742 states to 9742 states and 35963 transitions. [2021-06-05 06:16:31,802 INFO L78 Accepts]: Start accepts. Automaton has 9742 states and 35963 transitions. Word has length 28 [2021-06-05 06:16:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:31,802 INFO L482 AbstractCegarLoop]: Abstraction has 9742 states and 35963 transitions. [2021-06-05 06:16:31,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 9742 states and 35963 transitions. [2021-06-05 06:16:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:31,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:31,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:32,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:32,016 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash -725729772, now seen corresponding path program 101 times [2021-06-05 06:16:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398489886] [2021-06-05 06:16:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:32,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398489886] [2021-06-05 06:16:32,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398489886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996006986] [2021-06-05 06:16:32,162 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:32,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:32,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:32,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:32,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:16:32,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:32,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:47 [2021-06-05 06:16:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:16:32,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:32,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 06:16:32,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:32,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:32,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:32,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:32,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996006986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:32,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:32,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:32,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768228688] [2021-06-05 06:16:32,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:32,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:32,469 INFO L87 Difference]: Start difference. First operand 9742 states and 35963 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:33,062 INFO L93 Difference]: Finished difference Result 12452 states and 45102 transitions. [2021-06-05 06:16:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:33,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:33,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:33,085 INFO L225 Difference]: With dead ends: 12452 [2021-06-05 06:16:33,085 INFO L226 Difference]: Without dead ends: 12415 [2021-06-05 06:16:33,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12415 states. [2021-06-05 06:16:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12415 to 9757. [2021-06-05 06:16:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 3.691369413694137) internal successors, (36013), 9756 states have internal predecessors, (36013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 36013 transitions. [2021-06-05 06:16:33,230 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 36013 transitions. Word has length 28 [2021-06-05 06:16:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:33,230 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 36013 transitions. [2021-06-05 06:16:33,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 36013 transitions. [2021-06-05 06:16:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:33,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:33,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:33,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 06:16:33,444 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:33,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1427320980, now seen corresponding path program 102 times [2021-06-05 06:16:33,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:33,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434024557] [2021-06-05 06:16:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:33,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434024557] [2021-06-05 06:16:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434024557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607459446] [2021-06-05 06:16:33,601 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:33,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:16:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:16:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:33,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:33,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:33,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 101 [2021-06-05 06:16:33,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:33,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:136, output treesize:33 [2021-06-05 06:16:33,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:33,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 06:16:33,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:33,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:33,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:108 [2021-06-05 06:16:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:33,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:33,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:33,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:33,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:16:33,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:34,006 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 06:16:34,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:16:34,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-06-05 06:16:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:34,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607459446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:34,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:34,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:16:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814210807] [2021-06-05 06:16:34,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:34,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:34,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:34,105 INFO L87 Difference]: Start difference. First operand 9757 states and 36013 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:35,339 INFO L93 Difference]: Finished difference Result 12649 states and 45720 transitions. [2021-06-05 06:16:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:16:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-06-05 06:16:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:35,364 INFO L225 Difference]: With dead ends: 12649 [2021-06-05 06:16:35,364 INFO L226 Difference]: Without dead ends: 12627 [2021-06-05 06:16:35,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:16:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12627 states. [2021-06-05 06:16:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12627 to 9744. [2021-06-05 06:16:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9744 states, 9743 states have (on average 3.6938314687467924) internal successors, (35989), 9743 states have internal predecessors, (35989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 35989 transitions. [2021-06-05 06:16:35,507 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 35989 transitions. Word has length 28 [2021-06-05 06:16:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:35,507 INFO L482 AbstractCegarLoop]: Abstraction has 9744 states and 35989 transitions. [2021-06-05 06:16:35,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 35989 transitions. [2021-06-05 06:16:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:35,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:35,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:35,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:35,730 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1666712976, now seen corresponding path program 103 times [2021-06-05 06:16:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:35,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738351133] [2021-06-05 06:16:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:35,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:35,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738351133] [2021-06-05 06:16:35,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738351133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:35,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026559948] [2021-06-05 06:16:35,918 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:35,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:35,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:36,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:36,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:36,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:36,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:36,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:36,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:36,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:36,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:36,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:16:36,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:36,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:36,163 INFO L518 ElimStorePlain]: Eliminatee v_C_179 vanished before elimination [2021-06-05 06:16:36,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:36,163 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:16:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026559948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:36,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:36,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267274336] [2021-06-05 06:16:36,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:36,178 INFO L87 Difference]: Start difference. First operand 9744 states and 35989 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:36,774 INFO L93 Difference]: Finished difference Result 11077 states and 39775 transitions. [2021-06-05 06:16:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:36,794 INFO L225 Difference]: With dead ends: 11077 [2021-06-05 06:16:36,794 INFO L226 Difference]: Without dead ends: 11062 [2021-06-05 06:16:36,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-06-05 06:16:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9774. [2021-06-05 06:16:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9774 states, 9773 states have (on average 3.692827176915993) internal successors, (36090), 9773 states have internal predecessors, (36090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9774 states to 9774 states and 36090 transitions. [2021-06-05 06:16:36,967 INFO L78 Accepts]: Start accepts. Automaton has 9774 states and 36090 transitions. Word has length 28 [2021-06-05 06:16:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:36,967 INFO L482 AbstractCegarLoop]: Abstraction has 9774 states and 36090 transitions. [2021-06-05 06:16:36,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9774 states and 36090 transitions. [2021-06-05 06:16:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:36,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:36,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:37,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 06:16:37,183 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash -361685040, now seen corresponding path program 104 times [2021-06-05 06:16:37,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:37,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844026674] [2021-06-05 06:16:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:37,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:37,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844026674] [2021-06-05 06:16:37,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844026674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:37,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836161806] [2021-06-05 06:16:37,354 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:37,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:37,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:37,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:37,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:37,528 INFO L446 ElimStorePlain]: Different costs {0=[v_C_181], 1=[A]} [2021-06-05 06:16:37,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:16:37,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:16:37,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-06-05 06:16:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:37,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:37,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:37,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836161806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:37,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:37,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:37,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762967906] [2021-06-05 06:16:37,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:37,588 INFO L87 Difference]: Start difference. First operand 9774 states and 36090 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:38,177 INFO L93 Difference]: Finished difference Result 10963 states and 39523 transitions. [2021-06-05 06:16:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:16:38,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:38,196 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 06:16:38,196 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 06:16:38,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 06:16:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 9765. [2021-06-05 06:16:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 3.6945923801720606) internal successors, (36074), 9764 states have internal predecessors, (36074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 36074 transitions. [2021-06-05 06:16:38,341 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 36074 transitions. Word has length 28 [2021-06-05 06:16:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:38,341 INFO L482 AbstractCegarLoop]: Abstraction has 9765 states and 36074 transitions. [2021-06-05 06:16:38,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 36074 transitions. [2021-06-05 06:16:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:38,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:38,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:38,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:38,555 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 574248976, now seen corresponding path program 105 times [2021-06-05 06:16:38,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:38,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055093240] [2021-06-05 06:16:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:38,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055093240] [2021-06-05 06:16:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055093240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719357730] [2021-06-05 06:16:38,729 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:38,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:16:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:38,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:38,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:38,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:38,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:39,089 INFO L446 ElimStorePlain]: Different costs {0=[v_C_183, A], 2=[B]} [2021-06-05 06:16:39,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:39,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:39,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:16:39,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:39,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:39,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:39,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:16:39,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:39,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:39,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:39,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-06-05 06:16:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:39,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719357730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:39,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:39,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:16:39,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716223112] [2021-06-05 06:16:39,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:39,133 INFO L87 Difference]: Start difference. First operand 9765 states and 36074 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:40,195 INFO L93 Difference]: Finished difference Result 10757 states and 38831 transitions. [2021-06-05 06:16:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:16:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:40,214 INFO L225 Difference]: With dead ends: 10757 [2021-06-05 06:16:40,215 INFO L226 Difference]: Without dead ends: 10711 [2021-06-05 06:16:40,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 803.7ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:16:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10711 states. [2021-06-05 06:16:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10711 to 9813. [2021-06-05 06:16:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9813 states, 9812 states have (on average 3.6925193640440277) internal successors, (36231), 9812 states have internal predecessors, (36231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9813 states to 9813 states and 36231 transitions. [2021-06-05 06:16:40,358 INFO L78 Accepts]: Start accepts. Automaton has 9813 states and 36231 transitions. Word has length 28 [2021-06-05 06:16:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:40,358 INFO L482 AbstractCegarLoop]: Abstraction has 9813 states and 36231 transitions. [2021-06-05 06:16:40,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 9813 states and 36231 transitions. [2021-06-05 06:16:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:40,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:40,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:40,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:40,572 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash 705213332, now seen corresponding path program 106 times [2021-06-05 06:16:40,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:40,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159414578] [2021-06-05 06:16:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:40,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:40,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159414578] [2021-06-05 06:16:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159414578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985747446] [2021-06-05 06:16:40,825 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:40,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:40,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:40,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:40,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:40,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:40,996 INFO L446 ElimStorePlain]: Different costs {0=[v_C_185], 1=[B]} [2021-06-05 06:16:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:16:40,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:41,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:16:41,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:41,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:41,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:41,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-06-05 06:16:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:41,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:41,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:41,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:41,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:41,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985747446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:41,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:41,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:41,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122634450] [2021-06-05 06:16:41,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:41,057 INFO L87 Difference]: Start difference. First operand 9813 states and 36231 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:41,689 INFO L93 Difference]: Finished difference Result 11721 states and 41673 transitions. [2021-06-05 06:16:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:41,709 INFO L225 Difference]: With dead ends: 11721 [2021-06-05 06:16:41,710 INFO L226 Difference]: Without dead ends: 11659 [2021-06-05 06:16:41,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:16:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-06-05 06:16:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 9920. [2021-06-05 06:16:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9920 states, 9919 states have (on average 3.6937191249117856) internal successors, (36638), 9919 states have internal predecessors, (36638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 36638 transitions. [2021-06-05 06:16:41,857 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 36638 transitions. Word has length 28 [2021-06-05 06:16:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:41,857 INFO L482 AbstractCegarLoop]: Abstraction has 9920 states and 36638 transitions. [2021-06-05 06:16:41,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 36638 transitions. [2021-06-05 06:16:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:41,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:41,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:42,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:42,073 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash 171178420, now seen corresponding path program 107 times [2021-06-05 06:16:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:42,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190843463] [2021-06-05 06:16:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:42,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:42,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190843463] [2021-06-05 06:16:42,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190843463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:42,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453633384] [2021-06-05 06:16:42,271 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:42,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:42,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:42,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:42,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:42,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:16:42,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:42,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-06-05 06:16:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:42,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:16:42,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:42,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 06:16:42,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:42,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:42,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:42,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:42,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453633384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:42,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:42,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:42,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462700592] [2021-06-05 06:16:42,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:42,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:42,582 INFO L87 Difference]: Start difference. First operand 9920 states and 36638 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:43,142 INFO L93 Difference]: Finished difference Result 12635 states and 45808 transitions. [2021-06-05 06:16:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:16:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:43,165 INFO L225 Difference]: With dead ends: 12635 [2021-06-05 06:16:43,165 INFO L226 Difference]: Without dead ends: 12586 [2021-06-05 06:16:43,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2021-06-05 06:16:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 9928. [2021-06-05 06:16:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 9927 states have (on average 3.692454920922736) internal successors, (36655), 9927 states have internal predecessors, (36655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 36655 transitions. [2021-06-05 06:16:43,312 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 36655 transitions. Word has length 28 [2021-06-05 06:16:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:43,312 INFO L482 AbstractCegarLoop]: Abstraction has 9928 states and 36655 transitions. [2021-06-05 06:16:43,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 36655 transitions. [2021-06-05 06:16:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:43,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:43,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:43,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:43,548 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1158670032, now seen corresponding path program 108 times [2021-06-05 06:16:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:43,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088188256] [2021-06-05 06:16:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:43,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088188256] [2021-06-05 06:16:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088188256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243437353] [2021-06-05 06:16:43,786 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:43,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:43,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:43,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:43,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:43,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-06-05 06:16:43,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:43,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:34 [2021-06-05 06:16:43,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:43,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:43,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 06:16:44,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:44,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:44,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:44,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:44,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243437353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:44,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:44,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:44,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59282434] [2021-06-05 06:16:44,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:44,032 INFO L87 Difference]: Start difference. First operand 9928 states and 36655 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:44,533 INFO L93 Difference]: Finished difference Result 12663 states and 45885 transitions. [2021-06-05 06:16:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:44,558 INFO L225 Difference]: With dead ends: 12663 [2021-06-05 06:16:44,558 INFO L226 Difference]: Without dead ends: 12624 [2021-06-05 06:16:44,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12624 states. [2021-06-05 06:16:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 9929. [2021-06-05 06:16:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 3.692385173247381) internal successors, (36658), 9928 states have internal predecessors, (36658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 36658 transitions. [2021-06-05 06:16:44,717 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 36658 transitions. Word has length 28 [2021-06-05 06:16:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:44,717 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 36658 transitions. [2021-06-05 06:16:44,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 36658 transitions. [2021-06-05 06:16:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:44,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:44,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:45,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:45,000 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:45,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1201624854, now seen corresponding path program 109 times [2021-06-05 06:16:45,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:45,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648386956] [2021-06-05 06:16:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:45,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:45,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648386956] [2021-06-05 06:16:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648386956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:45,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153973650] [2021-06-05 06:16:45,178 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:45,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:45,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:45,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:45,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:45,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:45,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:45,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:45,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:45,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:16:45,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:45,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:45,446 INFO L518 ElimStorePlain]: Eliminatee v_C_191 vanished before elimination [2021-06-05 06:16:45,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:45,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 06:16:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:45,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153973650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:45,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:45,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:45,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230601122] [2021-06-05 06:16:45,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:45,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:45,466 INFO L87 Difference]: Start difference. First operand 9929 states and 36658 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:46,214 INFO L93 Difference]: Finished difference Result 12365 states and 43476 transitions. [2021-06-05 06:16:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:16:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:46,238 INFO L225 Difference]: With dead ends: 12365 [2021-06-05 06:16:46,238 INFO L226 Difference]: Without dead ends: 12322 [2021-06-05 06:16:46,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:16:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2021-06-05 06:16:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 9938. [2021-06-05 06:16:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9938 states, 9937 states have (on average 3.695380899667908) internal successors, (36721), 9937 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9938 states to 9938 states and 36721 transitions. [2021-06-05 06:16:46,399 INFO L78 Accepts]: Start accepts. Automaton has 9938 states and 36721 transitions. Word has length 28 [2021-06-05 06:16:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:46,399 INFO L482 AbstractCegarLoop]: Abstraction has 9938 states and 36721 transitions. [2021-06-05 06:16:46,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 9938 states and 36721 transitions. [2021-06-05 06:16:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:46,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:46,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:46,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 06:16:46,614 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:46,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1324280048, now seen corresponding path program 110 times [2021-06-05 06:16:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:46,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269793091] [2021-06-05 06:16:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:46,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269793091] [2021-06-05 06:16:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269793091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256491143] [2021-06-05 06:16:46,755 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:46,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:46,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:46,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:46,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:46,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:46,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:46,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:46,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:46,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:46,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:46,969 INFO L518 ElimStorePlain]: Eliminatee v_C_193 vanished before elimination [2021-06-05 06:16:46,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:46,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:46,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:46,972 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 06:16:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256491143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:46,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:46,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45962288] [2021-06-05 06:16:46,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:46,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:46,988 INFO L87 Difference]: Start difference. First operand 9938 states and 36721 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:47,384 INFO L93 Difference]: Finished difference Result 10770 states and 39102 transitions. [2021-06-05 06:16:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:16:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 28 [2021-06-05 06:16:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:47,403 INFO L225 Difference]: With dead ends: 10770 [2021-06-05 06:16:47,403 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 06:16:47,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 06:16:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9962. [2021-06-05 06:16:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 3.6937054512599135) internal successors, (36793), 9961 states have internal predecessors, (36793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 36793 transitions. [2021-06-05 06:16:47,554 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 36793 transitions. Word has length 28 [2021-06-05 06:16:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:47,554 INFO L482 AbstractCegarLoop]: Abstraction has 9962 states and 36793 transitions. [2021-06-05 06:16:47,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 06:16:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 36793 transitions. [2021-06-05 06:16:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:47,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:47,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:47,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 06:16:47,770 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1193315692, now seen corresponding path program 111 times [2021-06-05 06:16:47,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:47,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937716635] [2021-06-05 06:16:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:47,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937716635] [2021-06-05 06:16:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937716635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689196582] [2021-06-05 06:16:47,955 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:47,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:16:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:16:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:48,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:48,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:48,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:48,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:16:48,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:48,128 INFO L518 ElimStorePlain]: Eliminatee v_C_195 vanished before elimination [2021-06-05 06:16:48,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 06:16:48,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:48,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:48,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:48,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689196582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:48,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:48,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:48,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771046510] [2021-06-05 06:16:48,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:48,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:48,170 INFO L87 Difference]: Start difference. First operand 9962 states and 36793 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:49,126 INFO L93 Difference]: Finished difference Result 11762 states and 41954 transitions. [2021-06-05 06:16:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:16:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:49,197 INFO L225 Difference]: With dead ends: 11762 [2021-06-05 06:16:49,197 INFO L226 Difference]: Without dead ends: 11725 [2021-06-05 06:16:49,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:16:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-06-05 06:16:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 9985. [2021-06-05 06:16:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9985 states, 9984 states have (on average 3.6968149038461537) internal successors, (36909), 9984 states have internal predecessors, (36909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 36909 transitions. [2021-06-05 06:16:49,334 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 36909 transitions. Word has length 28 [2021-06-05 06:16:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:49,334 INFO L482 AbstractCegarLoop]: Abstraction has 9985 states and 36909 transitions. [2021-06-05 06:16:49,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 36909 transitions. [2021-06-05 06:16:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:49,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:49,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:49,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 06:16:49,548 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1151240340, now seen corresponding path program 112 times [2021-06-05 06:16:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:49,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660126188] [2021-06-05 06:16:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:49,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660126188] [2021-06-05 06:16:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660126188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324930878] [2021-06-05 06:16:49,708 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:49,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:49,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:49,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:49,858 INFO L446 ElimStorePlain]: Different costs {0=[v_C_197], 1=[B]} [2021-06-05 06:16:49,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:49,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:49,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 06:16:49,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:49,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-06-05 06:16:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:49,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:49,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:49,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:49,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324930878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:49,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:49,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:49,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092188173] [2021-06-05 06:16:49,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:49,939 INFO L87 Difference]: Start difference. First operand 9985 states and 36909 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:51,030 INFO L93 Difference]: Finished difference Result 11223 states and 40366 transitions. [2021-06-05 06:16:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:16:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:51,050 INFO L225 Difference]: With dead ends: 11223 [2021-06-05 06:16:51,050 INFO L226 Difference]: Without dead ends: 11186 [2021-06-05 06:16:51,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 830.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:16:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-06-05 06:16:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 10017. [2021-06-05 06:16:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10017 states, 10016 states have (on average 3.694988019169329) internal successors, (37009), 10016 states have internal predecessors, (37009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10017 states to 10017 states and 37009 transitions. [2021-06-05 06:16:51,201 INFO L78 Accepts]: Start accepts. Automaton has 10017 states and 37009 transitions. Word has length 28 [2021-06-05 06:16:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:51,201 INFO L482 AbstractCegarLoop]: Abstraction has 10017 states and 37009 transitions. [2021-06-05 06:16:51,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10017 states and 37009 transitions. [2021-06-05 06:16:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:51,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:51,215 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:51,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:51,416 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1950581624, now seen corresponding path program 113 times [2021-06-05 06:16:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:51,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718632290] [2021-06-05 06:16:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:51,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:51,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718632290] [2021-06-05 06:16:51,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718632290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:51,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15895239] [2021-06-05 06:16:51,557 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:51,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:51,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:51,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:51,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:51,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2021-06-05 06:16:51,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:51,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:21 [2021-06-05 06:16:51,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:51,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 06:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15895239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:51,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:51,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128763448] [2021-06-05 06:16:51,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:51,786 INFO L87 Difference]: Start difference. First operand 10017 states and 37009 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:52,333 INFO L93 Difference]: Finished difference Result 12848 states and 46558 transitions. [2021-06-05 06:16:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 06:16:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:52,357 INFO L225 Difference]: With dead ends: 12848 [2021-06-05 06:16:52,357 INFO L226 Difference]: Without dead ends: 12815 [2021-06-05 06:16:52,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:16:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12815 states. [2021-06-05 06:16:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12815 to 10025. [2021-06-05 06:16:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10025 states, 10024 states have (on average 3.6940343176376698) internal successors, (37029), 10024 states have internal predecessors, (37029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 37029 transitions. [2021-06-05 06:16:52,515 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 37029 transitions. Word has length 28 [2021-06-05 06:16:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:52,515 INFO L482 AbstractCegarLoop]: Abstraction has 10025 states and 37029 transitions. [2021-06-05 06:16:52,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-05 06:16:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 37029 transitions. [2021-06-05 06:16:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:52,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:52,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:52,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 06:16:52,730 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1356894060, now seen corresponding path program 114 times [2021-06-05 06:16:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:52,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123948751] [2021-06-05 06:16:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:52,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:52,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123948751] [2021-06-05 06:16:52,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123948751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:52,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122536887] [2021-06-05 06:16:52,899 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:52,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:52,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:52,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:52,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:52,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:52,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:52,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:53,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:53,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:53,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-06-05 06:16:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:53,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:16:53,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:53,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 06:16:53,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:53,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:53,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:53,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122536887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:53,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:53,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:53,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493022507] [2021-06-05 06:16:53,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:53,159 INFO L87 Difference]: Start difference. First operand 10025 states and 37029 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:53,844 INFO L93 Difference]: Finished difference Result 12912 states and 46714 transitions. [2021-06-05 06:16:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:53,867 INFO L225 Difference]: With dead ends: 12912 [2021-06-05 06:16:53,867 INFO L226 Difference]: Without dead ends: 12876 [2021-06-05 06:16:53,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:16:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12876 states. [2021-06-05 06:16:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12876 to 10024. [2021-06-05 06:16:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 3.694103561807842) internal successors, (37026), 10023 states have internal predecessors, (37026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 37026 transitions. [2021-06-05 06:16:54,016 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 37026 transitions. Word has length 28 [2021-06-05 06:16:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:54,017 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 37026 transitions. [2021-06-05 06:16:54,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 37026 transitions. [2021-06-05 06:16:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:54,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:54,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:54,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:54,245 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1127646672, now seen corresponding path program 115 times [2021-06-05 06:16:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:54,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222015141] [2021-06-05 06:16:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222015141] [2021-06-05 06:16:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222015141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759262539] [2021-06-05 06:16:54,394 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:54,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:54,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:54,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:54,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:54,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:54,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-06-05 06:16:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:16:54,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:54,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-06-05 06:16:54,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:54,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:54,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:54,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:54,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759262539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:54,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:54,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 06:16:54,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538809395] [2021-06-05 06:16:54,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:16:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:16:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:54,618 INFO L87 Difference]: Start difference. First operand 10024 states and 37026 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:55,270 INFO L93 Difference]: Finished difference Result 12887 states and 46654 transitions. [2021-06-05 06:16:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:55,293 INFO L225 Difference]: With dead ends: 12887 [2021-06-05 06:16:55,293 INFO L226 Difference]: Without dead ends: 12866 [2021-06-05 06:16:55,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:16:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12866 states. [2021-06-05 06:16:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12866 to 10028. [2021-06-05 06:16:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10027 states have (on average 3.6940261294504837) internal successors, (37040), 10027 states have internal predecessors, (37040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 37040 transitions. [2021-06-05 06:16:55,439 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 37040 transitions. Word has length 28 [2021-06-05 06:16:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:55,439 INFO L482 AbstractCegarLoop]: Abstraction has 10028 states and 37040 transitions. [2021-06-05 06:16:55,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 37040 transitions. [2021-06-05 06:16:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:55,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:55,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:55,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:55,654 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1389598472, now seen corresponding path program 116 times [2021-06-05 06:16:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358923186] [2021-06-05 06:16:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:55,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358923186] [2021-06-05 06:16:55,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358923186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922513882] [2021-06-05 06:16:55,782 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:55,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:55,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:55,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:55,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:55,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:55,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:55,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:55,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:16:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:55,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-06-05 06:16:55,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:55,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-05 06:16:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:55,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:55,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:55,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:55,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922513882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:55,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:55,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:16:55,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730221887] [2021-06-05 06:16:55,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:16:55,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:16:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:55,987 INFO L87 Difference]: Start difference. First operand 10028 states and 37040 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:56,751 INFO L93 Difference]: Finished difference Result 12914 states and 46791 transitions. [2021-06-05 06:16:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:16:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:56,774 INFO L225 Difference]: With dead ends: 12914 [2021-06-05 06:16:56,775 INFO L226 Difference]: Without dead ends: 12899 [2021-06-05 06:16:56,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:16:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2021-06-05 06:16:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 10052. [2021-06-05 06:16:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 3.692368918515571) internal successors, (37112), 10051 states have internal predecessors, (37112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 37112 transitions. [2021-06-05 06:16:56,934 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 37112 transitions. Word has length 28 [2021-06-05 06:16:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:56,934 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 37112 transitions. [2021-06-05 06:16:56,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 37112 transitions. [2021-06-05 06:16:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:56,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:56,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:57,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:57,153 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1597931756, now seen corresponding path program 117 times [2021-06-05 06:16:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584914046] [2021-06-05 06:16:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:57,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584914046] [2021-06-05 06:16:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584914046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:57,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449140912] [2021-06-05 06:16:57,351 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:57,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:57,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:16:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:57,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:16:57,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:57,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:16:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:57,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:57,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-06-05 06:16:57,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:57,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:57,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-06-05 06:16:57,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 06:16:57,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:57,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:57,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:57,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 06:16:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:57,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449140912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:57,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:57,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:16:57,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29792328] [2021-06-05 06:16:57,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:16:57,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:16:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:16:57,711 INFO L87 Difference]: Start difference. First operand 10052 states and 37112 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:58,461 INFO L93 Difference]: Finished difference Result 12993 states and 46992 transitions. [2021-06-05 06:16:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:16:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:58,485 INFO L225 Difference]: With dead ends: 12993 [2021-06-05 06:16:58,485 INFO L226 Difference]: Without dead ends: 12963 [2021-06-05 06:16:58,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:16:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12963 states. [2021-06-05 06:16:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12963 to 10070. [2021-06-05 06:16:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10069 states have (on average 3.6917270831264277) internal successors, (37172), 10069 states have internal predecessors, (37172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 37172 transitions. [2021-06-05 06:16:58,638 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 37172 transitions. Word has length 28 [2021-06-05 06:16:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:58,638 INFO L482 AbstractCegarLoop]: Abstraction has 10070 states and 37172 transitions. [2021-06-05 06:16:58,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 37172 transitions. [2021-06-05 06:16:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:16:58,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:58,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:58,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:58,857 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1625594160, now seen corresponding path program 118 times [2021-06-05 06:16:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:58,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161246183] [2021-06-05 06:16:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:58,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161246183] [2021-06-05 06:16:58,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161246183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743953954] [2021-06-05 06:16:58,990 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:59,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:16:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:16:59,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:16:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:16:59,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:16:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:16:59,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 06:16:59,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:16:59,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:16:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743953954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:16:59,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036539848] [2021-06-05 06:16:59,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:16:59,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:16:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:59,210 INFO L87 Difference]: Start difference. First operand 10070 states and 37172 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:59,906 INFO L93 Difference]: Finished difference Result 14117 states and 50820 transitions. [2021-06-05 06:16:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:16:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:59,934 INFO L225 Difference]: With dead ends: 14117 [2021-06-05 06:16:59,934 INFO L226 Difference]: Without dead ends: 14092 [2021-06-05 06:16:59,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:16:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14092 states. [2021-06-05 06:17:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14092 to 10066. [2021-06-05 06:17:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 10065 states have (on average 3.6918032786885244) internal successors, (37158), 10065 states have internal predecessors, (37158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 37158 transitions. [2021-06-05 06:17:00,102 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 37158 transitions. Word has length 28 [2021-06-05 06:17:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:00,102 INFO L482 AbstractCegarLoop]: Abstraction has 10066 states and 37158 transitions. [2021-06-05 06:17:00,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 37158 transitions. [2021-06-05 06:17:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:17:00,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:00,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:00,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:00,321 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 555118996, now seen corresponding path program 119 times [2021-06-05 06:17:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:00,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125073249] [2021-06-05 06:17:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:00,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125073249] [2021-06-05 06:17:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125073249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600915380] [2021-06-05 06:17:00,478 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:00,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:17:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:17:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:00,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:17:00,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:00,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:17:00,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:17:00,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:00,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:17:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:00,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:17:00,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:00,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-06-05 06:17:00,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:17:00,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:00,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:17:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:00,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600915380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:00,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:00,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:17:00,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546644436] [2021-06-05 06:17:00,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:17:00,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:17:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:17:00,698 INFO L87 Difference]: Start difference. First operand 10066 states and 37158 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:01,377 INFO L93 Difference]: Finished difference Result 12990 states and 47026 transitions. [2021-06-05 06:17:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:17:01,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:17:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:01,400 INFO L225 Difference]: With dead ends: 12990 [2021-06-05 06:17:01,400 INFO L226 Difference]: Without dead ends: 12975 [2021-06-05 06:17:01,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:17:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-06-05 06:17:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 10052. [2021-06-05 06:17:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 3.693960799920406) internal successors, (37128), 10051 states have internal predecessors, (37128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 37128 transitions. [2021-06-05 06:17:01,592 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 37128 transitions. Word has length 28 [2021-06-05 06:17:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:01,592 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 37128 transitions. [2021-06-05 06:17:01,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 37128 transitions. [2021-06-05 06:17:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:17:01,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:01,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:01,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 06:17:01,807 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:01,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1956104880, now seen corresponding path program 120 times [2021-06-05 06:17:01,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:01,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397615551] [2021-06-05 06:17:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:01,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397615551] [2021-06-05 06:17:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397615551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347926703] [2021-06-05 06:17:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:01,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:17:01,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:01,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:17:01,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:01,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:17:01,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:02,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:17:02,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:17:02,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:02,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-06-05 06:17:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:17:02,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:02,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-06-05 06:17:02,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:02,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 06:17:02,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:17:02,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:02,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:02,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 06:17:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:02,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347926703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:02,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:02,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:17:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498072893] [2021-06-05 06:17:02,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:17:02,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:17:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:17:02,329 INFO L87 Difference]: Start difference. First operand 10052 states and 37128 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:03,640 INFO L93 Difference]: Finished difference Result 13115 states and 47363 transitions. [2021-06-05 06:17:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:17:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 28 [2021-06-05 06:17:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:03,664 INFO L225 Difference]: With dead ends: 13115 [2021-06-05 06:17:03,664 INFO L226 Difference]: Without dead ends: 13085 [2021-06-05 06:17:03,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:17:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13085 states. [2021-06-05 06:17:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13085 to 10087. [2021-06-05 06:17:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 3.6931390045607775) internal successors, (37249), 10086 states have internal predecessors, (37249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 37249 transitions. [2021-06-05 06:17:03,820 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 37249 transitions. Word has length 28 [2021-06-05 06:17:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:03,820 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 37249 transitions. [2021-06-05 06:17:03,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 37249 transitions. [2021-06-05 06:17:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:17:03,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:03,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:04,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:04,035 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1416815204, now seen corresponding path program 121 times [2021-06-05 06:17:04,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:04,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922468386] [2021-06-05 06:17:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:04,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:04,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922468386] [2021-06-05 06:17:04,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922468386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:04,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424710115] [2021-06-05 06:17:04,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:17:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:17:04,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:04,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:17:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:17:04,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:04,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:17:04,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 06:17:04,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:04,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 06:17:04,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:17:04,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:04,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:04,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:17:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424710115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:04,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:04,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:17:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005531930] [2021-06-05 06:17:04,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:17:04,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:17:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:17:04,382 INFO L87 Difference]: Start difference. First operand 10087 states and 37249 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:05,054 INFO L93 Difference]: Finished difference Result 14163 states and 51009 transitions. [2021-06-05 06:17:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:17:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:17:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:05,080 INFO L225 Difference]: With dead ends: 14163 [2021-06-05 06:17:05,080 INFO L226 Difference]: Without dead ends: 14148 [2021-06-05 06:17:05,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:17:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14148 states. [2021-06-05 06:17:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14148 to 10078. [2021-06-05 06:17:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10078 states, 10077 states have (on average 3.6925672323112035) internal successors, (37210), 10077 states have internal predecessors, (37210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10078 states to 10078 states and 37210 transitions. [2021-06-05 06:17:05,247 INFO L78 Accepts]: Start accepts. Automaton has 10078 states and 37210 transitions. Word has length 28 [2021-06-05 06:17:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:05,247 INFO L482 AbstractCegarLoop]: Abstraction has 10078 states and 37210 transitions. [2021-06-05 06:17:05,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10078 states and 37210 transitions. [2021-06-05 06:17:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:17:05,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:05,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:05,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 06:17:05,463 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash 196945872, now seen corresponding path program 122 times [2021-06-05 06:17:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:05,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187146321] [2021-06-05 06:17:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:05,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187146321] [2021-06-05 06:17:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187146321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451416515] [2021-06-05 06:17:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:05,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:05,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:17:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:17:05,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:05,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 06:17:05,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:17:05,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:05,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:17:05,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:17:05,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:05,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-06-05 06:17:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:17:05,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:05,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:05,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 06:17:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451416515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:05,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:05,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:17:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74733920] [2021-06-05 06:17:05,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:17:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:17:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:17:05,948 INFO L87 Difference]: Start difference. First operand 10078 states and 37210 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:06,580 INFO L93 Difference]: Finished difference Result 13048 states and 47207 transitions. [2021-06-05 06:17:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:17:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 28 [2021-06-05 06:17:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:06,604 INFO L225 Difference]: With dead ends: 13048 [2021-06-05 06:17:06,604 INFO L226 Difference]: Without dead ends: 13023 [2021-06-05 06:17:06,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:17:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13023 states. [2021-06-05 06:17:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13023 to 10072. [2021-06-05 06:17:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.6937742031575813) internal successors, (37200), 10071 states have internal predecessors, (37200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 37200 transitions. [2021-06-05 06:17:06,757 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 37200 transitions. Word has length 28 [2021-06-05 06:17:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:06,757 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 37200 transitions. [2021-06-05 06:17:06,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 37200 transitions. [2021-06-05 06:17:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:17:06,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:06,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:06,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 06:17:06,972 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1892178224, now seen corresponding path program 123 times [2021-06-05 06:17:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:06,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541560312] [2021-06-05 06:17:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:07,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:07,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541560312] [2021-06-05 06:17:07,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541560312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:07,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353487003] [2021-06-05 06:17:07,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:07,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:17:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:17:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:07,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:17:07,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 06:17:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-06-05 06:17:07,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:17:07,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:37 [2021-06-05 06:17:07,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:07,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 06:17:07,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:17:07,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:17:07,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:76 [2021-06-05 06:17:07,720 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_21, v_prenex_22], 2=[A, v_prenex_23]} [2021-06-05 06:17:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:17:07,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:17:07,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:07,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-06-05 06:17:07,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 06:17:07,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:07,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:07,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:17:07,865 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:83 [2021-06-05 06:17:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353487003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:07,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:07,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:17:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820451082] [2021-06-05 06:17:07,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:17:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:17:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:17:07,996 INFO L87 Difference]: Start difference. First operand 10072 states and 37200 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:09,108 INFO L93 Difference]: Finished difference Result 12969 states and 46995 transitions. [2021-06-05 06:17:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:17:09,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 28 [2021-06-05 06:17:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:09,132 INFO L225 Difference]: With dead ends: 12969 [2021-06-05 06:17:09,133 INFO L226 Difference]: Without dead ends: 12954 [2021-06-05 06:17:09,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:17:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12954 states. [2021-06-05 06:17:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12954 to 10064. [2021-06-05 06:17:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10064 states, 10063 states have (on average 3.6947232435655373) internal successors, (37180), 10063 states have internal predecessors, (37180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10064 states to 10064 states and 37180 transitions. [2021-06-05 06:17:09,282 INFO L78 Accepts]: Start accepts. Automaton has 10064 states and 37180 transitions. Word has length 28 [2021-06-05 06:17:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 10064 states and 37180 transitions. [2021-06-05 06:17:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10064 states and 37180 transitions. [2021-06-05 06:17:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:09,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:09,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:09,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 06:17:09,496 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2051579474, now seen corresponding path program 124 times [2021-06-05 06:17:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:09,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036870278] [2021-06-05 06:17:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:09,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036870278] [2021-06-05 06:17:09,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036870278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912736658] [2021-06-05 06:17:09,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:09,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912736658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:09,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:09,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:17:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633215078] [2021-06-05 06:17:09,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:09,589 INFO L87 Difference]: Start difference. First operand 10064 states and 37180 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:09,744 INFO L93 Difference]: Finished difference Result 15939 states and 56045 transitions. [2021-06-05 06:17:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-06-05 06:17:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:09,773 INFO L225 Difference]: With dead ends: 15939 [2021-06-05 06:17:09,773 INFO L226 Difference]: Without dead ends: 15797 [2021-06-05 06:17:09,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:17:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-05 06:17:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 10916. [2021-06-05 06:17:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10916 states, 10915 states have (on average 3.676408612001832) internal successors, (40128), 10915 states have internal predecessors, (40128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10916 states to 10916 states and 40128 transitions. [2021-06-05 06:17:10,001 INFO L78 Accepts]: Start accepts. Automaton has 10916 states and 40128 transitions. Word has length 30 [2021-06-05 06:17:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 10916 states and 40128 transitions. [2021-06-05 06:17:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10916 states and 40128 transitions. [2021-06-05 06:17:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:10,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:10,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:10,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 06:17:10,218 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 517875058, now seen corresponding path program 125 times [2021-06-05 06:17:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:10,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756599507] [2021-06-05 06:17:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:10,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756599507] [2021-06-05 06:17:10,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756599507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688998367] [2021-06-05 06:17:10,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:10,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:17:10,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:10,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688998367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:17:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527082051] [2021-06-05 06:17:10,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:10,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:10,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:10,324 INFO L87 Difference]: Start difference. First operand 10916 states and 40128 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:10,486 INFO L93 Difference]: Finished difference Result 16904 states and 60841 transitions. [2021-06-05 06:17:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:17:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-06-05 06:17:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:10,514 INFO L225 Difference]: With dead ends: 16904 [2021-06-05 06:17:10,515 INFO L226 Difference]: Without dead ends: 16783 [2021-06-05 06:17:10,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:17:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-06-05 06:17:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 14514. [2021-06-05 06:17:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14514 states, 14513 states have (on average 3.717425756218563) internal successors, (53951), 14513 states have internal predecessors, (53951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14514 states to 14514 states and 53951 transitions. [2021-06-05 06:17:10,752 INFO L78 Accepts]: Start accepts. Automaton has 14514 states and 53951 transitions. Word has length 30 [2021-06-05 06:17:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:10,753 INFO L482 AbstractCegarLoop]: Abstraction has 14514 states and 53951 transitions. [2021-06-05 06:17:10,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 14514 states and 53951 transitions. [2021-06-05 06:17:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:10,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:10,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:10,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-05 06:17:10,975 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1497741678, now seen corresponding path program 126 times [2021-06-05 06:17:10,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:10,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46332002] [2021-06-05 06:17:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:11,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:11,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46332002] [2021-06-05 06:17:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46332002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:11,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330525850] [2021-06-05 06:17:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:11,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:17:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330525850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:11,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:11,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:17:11,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403171175] [2021-06-05 06:17:11,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:11,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:11,107 INFO L87 Difference]: Start difference. First operand 14514 states and 53951 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:11,294 INFO L93 Difference]: Finished difference Result 23573 states and 86435 transitions. [2021-06-05 06:17:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:17:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-06-05 06:17:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:11,339 INFO L225 Difference]: With dead ends: 23573 [2021-06-05 06:17:11,339 INFO L226 Difference]: Without dead ends: 23291 [2021-06-05 06:17:11,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:17:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23291 states. [2021-06-05 06:17:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23291 to 20337. [2021-06-05 06:17:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20337 states, 20336 states have (on average 3.776062155782848) internal successors, (76790), 20336 states have internal predecessors, (76790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20337 states to 20337 states and 76790 transitions. [2021-06-05 06:17:11,686 INFO L78 Accepts]: Start accepts. Automaton has 20337 states and 76790 transitions. Word has length 30 [2021-06-05 06:17:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:11,686 INFO L482 AbstractCegarLoop]: Abstraction has 20337 states and 76790 transitions. [2021-06-05 06:17:11,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-05 06:17:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 20337 states and 76790 transitions. [2021-06-05 06:17:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:11,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:11,715 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:11,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 06:17:11,916 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1273390866, now seen corresponding path program 127 times [2021-06-05 06:17:11,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:11,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799473432] [2021-06-05 06:17:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799473432] [2021-06-05 06:17:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799473432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784331983] [2021-06-05 06:17:11,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:11,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:12,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784331983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:12,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:12,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45519787] [2021-06-05 06:17:12,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:12,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:12,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:12,009 INFO L87 Difference]: Start difference. First operand 20337 states and 76790 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:12,157 INFO L93 Difference]: Finished difference Result 22831 states and 84032 transitions. [2021-06-05 06:17:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:12,204 INFO L225 Difference]: With dead ends: 22831 [2021-06-05 06:17:12,204 INFO L226 Difference]: Without dead ends: 22805 [2021-06-05 06:17:12,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22805 states. [2021-06-05 06:17:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22805 to 18685. [2021-06-05 06:17:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18685 states, 18684 states have (on average 3.7420787839862983) internal successors, (69917), 18684 states have internal predecessors, (69917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18685 states to 18685 states and 69917 transitions. [2021-06-05 06:17:12,621 INFO L78 Accepts]: Start accepts. Automaton has 18685 states and 69917 transitions. Word has length 30 [2021-06-05 06:17:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:12,621 INFO L482 AbstractCegarLoop]: Abstraction has 18685 states and 69917 transitions. [2021-06-05 06:17:12,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18685 states and 69917 transitions. [2021-06-05 06:17:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:12,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:12,650 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:12,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:12,853 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -102437964, now seen corresponding path program 128 times [2021-06-05 06:17:12,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:12,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990884517] [2021-06-05 06:17:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:12,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990884517] [2021-06-05 06:17:12,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990884517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525485101] [2021-06-05 06:17:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:12,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:12,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:12,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525485101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:12,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:12,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:12,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588458089] [2021-06-05 06:17:12,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:12,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:12,943 INFO L87 Difference]: Start difference. First operand 18685 states and 69917 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:13,083 INFO L93 Difference]: Finished difference Result 20773 states and 75980 transitions. [2021-06-05 06:17:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:17:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:13,123 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 06:17:13,123 INFO L226 Difference]: Without dead ends: 20731 [2021-06-05 06:17:13,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:17:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20731 states. [2021-06-05 06:17:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20731 to 17544. [2021-06-05 06:17:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17544 states, 17543 states have (on average 3.7447414923331244) internal successors, (65694), 17543 states have internal predecessors, (65694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17544 states to 17544 states and 65694 transitions. [2021-06-05 06:17:13,416 INFO L78 Accepts]: Start accepts. Automaton has 17544 states and 65694 transitions. Word has length 30 [2021-06-05 06:17:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:13,417 INFO L482 AbstractCegarLoop]: Abstraction has 17544 states and 65694 transitions. [2021-06-05 06:17:13,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17544 states and 65694 transitions. [2021-06-05 06:17:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:13,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:13,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:13,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:13,643 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1557721912, now seen corresponding path program 129 times [2021-06-05 06:17:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:13,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572878891] [2021-06-05 06:17:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:13,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:13,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572878891] [2021-06-05 06:17:13,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572878891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:13,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861662977] [2021-06-05 06:17:13,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:13,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:17:13,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861662977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:13,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:13,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 06:17:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108972434] [2021-06-05 06:17:13,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:17:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:17:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:13,764 INFO L87 Difference]: Start difference. First operand 17544 states and 65694 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:14,822 INFO L93 Difference]: Finished difference Result 34966 states and 125269 transitions. [2021-06-05 06:17:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:17:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 30 [2021-06-05 06:17:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:14,900 INFO L225 Difference]: With dead ends: 34966 [2021-06-05 06:17:14,900 INFO L226 Difference]: Without dead ends: 34576 [2021-06-05 06:17:14,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=1120, Invalid=4282, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:17:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34576 states. [2021-06-05 06:17:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34576 to 24016. [2021-06-05 06:17:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24016 states, 24015 states have (on average 3.765521549031855) internal successors, (90429), 24015 states have internal predecessors, (90429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24016 states to 24016 states and 90429 transitions. [2021-06-05 06:17:15,489 INFO L78 Accepts]: Start accepts. Automaton has 24016 states and 90429 transitions. Word has length 30 [2021-06-05 06:17:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:15,489 INFO L482 AbstractCegarLoop]: Abstraction has 24016 states and 90429 transitions. [2021-06-05 06:17:15,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24016 states and 90429 transitions. [2021-06-05 06:17:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:15,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:15,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:15,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:15,723 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash 155608238, now seen corresponding path program 130 times [2021-06-05 06:17:15,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:15,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231403059] [2021-06-05 06:17:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231403059] [2021-06-05 06:17:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231403059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324043852] [2021-06-05 06:17:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:15,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:15,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324043852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:15,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:15,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:15,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536140396] [2021-06-05 06:17:15,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:15,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:15,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:15,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:15,828 INFO L87 Difference]: Start difference. First operand 24016 states and 90429 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:16,045 INFO L93 Difference]: Finished difference Result 40420 states and 148635 transitions. [2021-06-05 06:17:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:16,138 INFO L225 Difference]: With dead ends: 40420 [2021-06-05 06:17:16,138 INFO L226 Difference]: Without dead ends: 40404 [2021-06-05 06:17:16,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40404 states. [2021-06-05 06:17:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40404 to 31559. [2021-06-05 06:17:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31559 states, 31558 states have (on average 3.8120286456682932) internal successors, (120300), 31558 states have internal predecessors, (120300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 120300 transitions. [2021-06-05 06:17:16,784 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 120300 transitions. Word has length 30 [2021-06-05 06:17:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:16,784 INFO L482 AbstractCegarLoop]: Abstraction has 31559 states and 120300 transitions. [2021-06-05 06:17:16,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 120300 transitions. [2021-06-05 06:17:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:16,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:16,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:17,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 06:17:17,035 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash -422729102, now seen corresponding path program 131 times [2021-06-05 06:17:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:17,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322441835] [2021-06-05 06:17:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:17,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:17,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322441835] [2021-06-05 06:17:17,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322441835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:17,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175506100] [2021-06-05 06:17:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:17,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:17:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:17,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175506100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:17,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:17,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:17,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832334428] [2021-06-05 06:17:17,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:17,114 INFO L87 Difference]: Start difference. First operand 31559 states and 120300 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:17,332 INFO L93 Difference]: Finished difference Result 37745 states and 141963 transitions. [2021-06-05 06:17:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:17:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:17,411 INFO L225 Difference]: With dead ends: 37745 [2021-06-05 06:17:17,412 INFO L226 Difference]: Without dead ends: 37705 [2021-06-05 06:17:17,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:17:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37705 states. [2021-06-05 06:17:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37705 to 32221. [2021-06-05 06:17:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32221 states, 32220 states have (on average 3.821787709497207) internal successors, (123138), 32220 states have internal predecessors, (123138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32221 states to 32221 states and 123138 transitions. [2021-06-05 06:17:18,309 INFO L78 Accepts]: Start accepts. Automaton has 32221 states and 123138 transitions. Word has length 30 [2021-06-05 06:17:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:18,309 INFO L482 AbstractCegarLoop]: Abstraction has 32221 states and 123138 transitions. [2021-06-05 06:17:18,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32221 states and 123138 transitions. [2021-06-05 06:17:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:18,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:18,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:18,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 06:17:18,560 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 736974234, now seen corresponding path program 132 times [2021-06-05 06:17:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:18,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464300948] [2021-06-05 06:17:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:18,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464300948] [2021-06-05 06:17:18,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464300948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768726712] [2021-06-05 06:17:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:18,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:17:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:18,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768726712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:18,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:18,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238011873] [2021-06-05 06:17:18,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:18,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:18,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:18,641 INFO L87 Difference]: Start difference. First operand 32221 states and 123138 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:19,047 INFO L93 Difference]: Finished difference Result 37446 states and 139719 transitions. [2021-06-05 06:17:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:19,166 INFO L225 Difference]: With dead ends: 37446 [2021-06-05 06:17:19,166 INFO L226 Difference]: Without dead ends: 37436 [2021-06-05 06:17:19,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37436 states. [2021-06-05 06:17:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37436 to 32725. [2021-06-05 06:17:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32725 states, 32724 states have (on average 3.8117283950617282) internal successors, (124735), 32724 states have internal predecessors, (124735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32725 states to 32725 states and 124735 transitions. [2021-06-05 06:17:20,032 INFO L78 Accepts]: Start accepts. Automaton has 32725 states and 124735 transitions. Word has length 30 [2021-06-05 06:17:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:20,032 INFO L482 AbstractCegarLoop]: Abstraction has 32725 states and 124735 transitions. [2021-06-05 06:17:20,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32725 states and 124735 transitions. [2021-06-05 06:17:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:20,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:20,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:20,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:20,294 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash -638854596, now seen corresponding path program 133 times [2021-06-05 06:17:20,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:20,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568567916] [2021-06-05 06:17:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:20,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568567916] [2021-06-05 06:17:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568567916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149217761] [2021-06-05 06:17:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:20,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:20,464 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 06:17:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149217761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:20,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:20,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:20,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844392653] [2021-06-05 06:17:20,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:20,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:20,525 INFO L87 Difference]: Start difference. First operand 32725 states and 124735 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:20,743 INFO L93 Difference]: Finished difference Result 38546 states and 142423 transitions. [2021-06-05 06:17:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:17:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-06-05 06:17:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:20,832 INFO L225 Difference]: With dead ends: 38546 [2021-06-05 06:17:20,832 INFO L226 Difference]: Without dead ends: 38456 [2021-06-05 06:17:20,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:17:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38456 states. [2021-06-05 06:17:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38456 to 29232. [2021-06-05 06:17:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29232 states, 29231 states have (on average 3.7868016831446067) internal successors, (110692), 29231 states have internal predecessors, (110692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29232 states to 29232 states and 110692 transitions. [2021-06-05 06:17:21,635 INFO L78 Accepts]: Start accepts. Automaton has 29232 states and 110692 transitions. Word has length 30 [2021-06-05 06:17:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:21,635 INFO L482 AbstractCegarLoop]: Abstraction has 29232 states and 110692 transitions. [2021-06-05 06:17:21,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-06-05 06:17:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29232 states and 110692 transitions. [2021-06-05 06:17:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:21,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:21,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:21,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 06:17:21,887 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 331177430, now seen corresponding path program 134 times [2021-06-05 06:17:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:21,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842946526] [2021-06-05 06:17:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:21,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842946526] [2021-06-05 06:17:21,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842946526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140337700] [2021-06-05 06:17:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:21,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:21,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:21,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140337700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:21,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:21,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:17:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745057139] [2021-06-05 06:17:21,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:17:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:17:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:17:21,979 INFO L87 Difference]: Start difference. First operand 29232 states and 110692 transitions. Second operand has 8 states, 8 states have (on average 4.375) 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) [2021-06-05 06:17:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:22,357 INFO L93 Difference]: Finished difference Result 33404 states and 122776 transitions. [2021-06-05 06:17:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) 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 30 [2021-06-05 06:17:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:22,433 INFO L225 Difference]: With dead ends: 33404 [2021-06-05 06:17:22,433 INFO L226 Difference]: Without dead ends: 33390 [2021-06-05 06:17:22,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33390 states. [2021-06-05 06:17:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33390 to 28626. [2021-06-05 06:17:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28626 states, 28625 states have (on average 3.7515458515283844) internal successors, (107388), 28625 states have internal predecessors, (107388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28626 states to 28626 states and 107388 transitions. [2021-06-05 06:17:23,152 INFO L78 Accepts]: Start accepts. Automaton has 28626 states and 107388 transitions. Word has length 30 [2021-06-05 06:17:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:23,153 INFO L482 AbstractCegarLoop]: Abstraction has 28626 states and 107388 transitions. [2021-06-05 06:17:23,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) 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) [2021-06-05 06:17:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 28626 states and 107388 transitions. [2021-06-05 06:17:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:23,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:23,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:23,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:23,399 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 899933846, now seen corresponding path program 135 times [2021-06-05 06:17:23,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:23,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182291112] [2021-06-05 06:17:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182291112] [2021-06-05 06:17:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182291112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147032860] [2021-06-05 06:17:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:23,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:17:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:23,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147032860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:23,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:23,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:17:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815465011] [2021-06-05 06:17:23,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:17:23,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:17:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:17:23,524 INFO L87 Difference]: Start difference. First operand 28626 states and 107388 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:23,914 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-06-05 06:17:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:25,108 INFO L93 Difference]: Finished difference Result 56380 states and 199143 transitions. [2021-06-05 06:17:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:17:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:25,250 INFO L225 Difference]: With dead ends: 56380 [2021-06-05 06:17:25,250 INFO L226 Difference]: Without dead ends: 55515 [2021-06-05 06:17:25,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 793.2ms TimeCoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:17:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55515 states. [2021-06-05 06:17:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55515 to 28782. [2021-06-05 06:17:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28782 states, 28781 states have (on average 3.7031027413918904) internal successors, (106579), 28781 states have internal predecessors, (106579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28782 states to 28782 states and 106579 transitions. [2021-06-05 06:17:26,026 INFO L78 Accepts]: Start accepts. Automaton has 28782 states and 106579 transitions. Word has length 30 [2021-06-05 06:17:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:26,026 INFO L482 AbstractCegarLoop]: Abstraction has 28782 states and 106579 transitions. [2021-06-05 06:17:26,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28782 states and 106579 transitions. [2021-06-05 06:17:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:26,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:26,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:26,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 06:17:26,425 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1381936088, now seen corresponding path program 136 times [2021-06-05 06:17:26,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:26,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030644313] [2021-06-05 06:17:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:26,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030644313] [2021-06-05 06:17:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030644313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431960185] [2021-06-05 06:17:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:26,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:26,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:26,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431960185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:26,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:26,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 06:17:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544064807] [2021-06-05 06:17:26,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:17:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:17:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:26,535 INFO L87 Difference]: Start difference. First operand 28782 states and 106579 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:27,494 INFO L93 Difference]: Finished difference Result 46545 states and 165588 transitions. [2021-06-05 06:17:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:17:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:27,603 INFO L225 Difference]: With dead ends: 46545 [2021-06-05 06:17:27,603 INFO L226 Difference]: Without dead ends: 46370 [2021-06-05 06:17:27,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=669, Invalid=2301, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:17:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46370 states. [2021-06-05 06:17:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46370 to 30642. [2021-06-05 06:17:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30642 states, 30641 states have (on average 3.7180248686400574) internal successors, (113924), 30641 states have internal predecessors, (113924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30642 states to 30642 states and 113924 transitions. [2021-06-05 06:17:28,434 INFO L78 Accepts]: Start accepts. Automaton has 30642 states and 113924 transitions. Word has length 30 [2021-06-05 06:17:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:28,434 INFO L482 AbstractCegarLoop]: Abstraction has 30642 states and 113924 transitions. [2021-06-05 06:17:28,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30642 states and 113924 transitions. [2021-06-05 06:17:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:28,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:28,479 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:28,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:28,680 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:28,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1418419144, now seen corresponding path program 137 times [2021-06-05 06:17:28,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:28,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79104154] [2021-06-05 06:17:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:28,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:28,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79104154] [2021-06-05 06:17:28,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79104154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:28,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690815011] [2021-06-05 06:17:28,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:28,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:17:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:17:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:28,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690815011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:28,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:28,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:28,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918483274] [2021-06-05 06:17:28,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:28,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:28,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:28,784 INFO L87 Difference]: Start difference. First operand 30642 states and 113924 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:29,009 INFO L93 Difference]: Finished difference Result 39073 states and 143388 transitions. [2021-06-05 06:17:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:17:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:29,095 INFO L225 Difference]: With dead ends: 39073 [2021-06-05 06:17:29,095 INFO L226 Difference]: Without dead ends: 39036 [2021-06-05 06:17:29,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:17:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39036 states. [2021-06-05 06:17:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39036 to 35796. [2021-06-05 06:17:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 3.734655678167342) internal successors, (133682), 35795 states have internal predecessors, (133682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 133682 transitions. [2021-06-05 06:17:30,188 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 133682 transitions. Word has length 30 [2021-06-05 06:17:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:30,189 INFO L482 AbstractCegarLoop]: Abstraction has 35796 states and 133682 transitions. [2021-06-05 06:17:30,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 133682 transitions. [2021-06-05 06:17:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:30,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:30,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:30,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:30,449 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -198212408, now seen corresponding path program 138 times [2021-06-05 06:17:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:30,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941379033] [2021-06-05 06:17:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:30,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:30,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941379033] [2021-06-05 06:17:30,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941379033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:30,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459243544] [2021-06-05 06:17:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:30,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:17:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:30,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459243544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:30,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:30,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 06:17:30,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212076425] [2021-06-05 06:17:30,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:17:30,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:17:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:30,550 INFO L87 Difference]: Start difference. First operand 35796 states and 133682 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-06-05 06:17:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:31,447 INFO L93 Difference]: Finished difference Result 52098 states and 181980 transitions. [2021-06-05 06:17:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:17:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:31,795 INFO L225 Difference]: With dead ends: 52098 [2021-06-05 06:17:31,795 INFO L226 Difference]: Without dead ends: 51998 [2021-06-05 06:17:31,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=948, Invalid=3474, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:17:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51998 states. [2021-06-05 06:17:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51998 to 33705. [2021-06-05 06:17:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33705 states, 33704 states have (on average 3.711250890102065) internal successors, (125084), 33704 states have internal predecessors, (125084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33705 states to 33705 states and 125084 transitions. [2021-06-05 06:17:32,813 INFO L78 Accepts]: Start accepts. Automaton has 33705 states and 125084 transitions. Word has length 30 [2021-06-05 06:17:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:32,813 INFO L482 AbstractCegarLoop]: Abstraction has 33705 states and 125084 transitions. [2021-06-05 06:17:32,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-06-05 06:17:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33705 states and 125084 transitions. [2021-06-05 06:17:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:32,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:32,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:33,061 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1470112996, now seen corresponding path program 139 times [2021-06-05 06:17:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605239255] [2021-06-05 06:17:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:33,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:33,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605239255] [2021-06-05 06:17:33,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605239255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:33,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835790051] [2021-06-05 06:17:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835790051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:33,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:33,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 06:17:33,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418928378] [2021-06-05 06:17:33,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:17:33,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:17:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:33,175 INFO L87 Difference]: Start difference. First operand 33705 states and 125084 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) [2021-06-05 06:17:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:34,426 INFO L93 Difference]: Finished difference Result 49885 states and 171670 transitions. [2021-06-05 06:17:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:17:34,426 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 30 [2021-06-05 06:17:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:34,535 INFO L225 Difference]: With dead ends: 49885 [2021-06-05 06:17:34,536 INFO L226 Difference]: Without dead ends: 49560 [2021-06-05 06:17:34,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=1199, Invalid=3771, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:17:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49560 states. [2021-06-05 06:17:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49560 to 33560. [2021-06-05 06:17:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33560 states, 33559 states have (on average 3.6864328496081527) internal successors, (123713), 33559 states have internal predecessors, (123713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33560 states to 33560 states and 123713 transitions. [2021-06-05 06:17:35,394 INFO L78 Accepts]: Start accepts. Automaton has 33560 states and 123713 transitions. Word has length 30 [2021-06-05 06:17:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:35,394 INFO L482 AbstractCegarLoop]: Abstraction has 33560 states and 123713 transitions. [2021-06-05 06:17:35,394 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) [2021-06-05 06:17:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 33560 states and 123713 transitions. [2021-06-05 06:17:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:35,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:35,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 06:17:35,644 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -415712398, now seen corresponding path program 140 times [2021-06-05 06:17:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328717456] [2021-06-05 06:17:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:35,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:35,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328717456] [2021-06-05 06:17:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328717456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:35,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389729889] [2021-06-05 06:17:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:35,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:35,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:35,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389729889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:35,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:35,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:17:35,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280739583] [2021-06-05 06:17:35,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:17:35,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:17:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:17:35,728 INFO L87 Difference]: Start difference. First operand 33560 states and 123713 transitions. Second operand has 8 states, 8 states have (on average 4.375) 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) [2021-06-05 06:17:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:35,943 INFO L93 Difference]: Finished difference Result 36661 states and 132702 transitions. [2021-06-05 06:17:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) 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 30 [2021-06-05 06:17:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:36,024 INFO L225 Difference]: With dead ends: 36661 [2021-06-05 06:17:36,024 INFO L226 Difference]: Without dead ends: 36504 [2021-06-05 06:17:36,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:17:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36504 states. [2021-06-05 06:17:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36504 to 33273. [2021-06-05 06:17:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33273 states, 33272 states have (on average 3.6911817744650155) internal successors, (122813), 33272 states have internal predecessors, (122813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33273 states to 33273 states and 122813 transitions. [2021-06-05 06:17:36,857 INFO L78 Accepts]: Start accepts. Automaton has 33273 states and 122813 transitions. Word has length 30 [2021-06-05 06:17:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:36,857 INFO L482 AbstractCegarLoop]: Abstraction has 33273 states and 122813 transitions. [2021-06-05 06:17:36,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) 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) [2021-06-05 06:17:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33273 states and 122813 transitions. [2021-06-05 06:17:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:36,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:36,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:37,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 06:17:37,109 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -947319082, now seen corresponding path program 141 times [2021-06-05 06:17:37,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:37,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456314217] [2021-06-05 06:17:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:37,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:37,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456314217] [2021-06-05 06:17:37,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456314217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:37,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384729784] [2021-06-05 06:17:37,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:37,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:17:37,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:37,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384729784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:37,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:37,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:17:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440826136] [2021-06-05 06:17:37,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:17:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:17:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:17:37,202 INFO L87 Difference]: Start difference. First operand 33273 states and 122813 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:37,474 INFO L93 Difference]: Finished difference Result 42007 states and 149175 transitions. [2021-06-05 06:17:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:37,574 INFO L225 Difference]: With dead ends: 42007 [2021-06-05 06:17:37,574 INFO L226 Difference]: Without dead ends: 41957 [2021-06-05 06:17:37,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41957 states. [2021-06-05 06:17:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41957 to 33022. [2021-06-05 06:17:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33022 states, 33021 states have (on average 3.6783561975712424) internal successors, (121463), 33021 states have internal predecessors, (121463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33022 states to 33022 states and 121463 transitions. [2021-06-05 06:17:38,438 INFO L78 Accepts]: Start accepts. Automaton has 33022 states and 121463 transitions. Word has length 30 [2021-06-05 06:17:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:38,438 INFO L482 AbstractCegarLoop]: Abstraction has 33022 states and 121463 transitions. [2021-06-05 06:17:38,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 33022 states and 121463 transitions. [2021-06-05 06:17:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:38,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:38,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 06:17:38,689 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -88577934, now seen corresponding path program 142 times [2021-06-05 06:17:38,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:38,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952567016] [2021-06-05 06:17:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:38,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:38,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952567016] [2021-06-05 06:17:38,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952567016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:38,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422851790] [2021-06-05 06:17:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:38,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:38,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:38,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422851790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509822665] [2021-06-05 06:17:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:38,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:38,773 INFO L87 Difference]: Start difference. First operand 33022 states and 121463 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:39,228 INFO L93 Difference]: Finished difference Result 40530 states and 147343 transitions. [2021-06-05 06:17:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:17:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:39,318 INFO L225 Difference]: With dead ends: 40530 [2021-06-05 06:17:39,318 INFO L226 Difference]: Without dead ends: 40477 [2021-06-05 06:17:39,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:17:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40477 states. [2021-06-05 06:17:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40477 to 37757. [2021-06-05 06:17:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37757 states, 37756 states have (on average 3.6998622735459263) internal successors, (139692), 37756 states have internal predecessors, (139692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37757 states to 37757 states and 139692 transitions. [2021-06-05 06:17:40,234 INFO L78 Accepts]: Start accepts. Automaton has 37757 states and 139692 transitions. Word has length 30 [2021-06-05 06:17:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:40,234 INFO L482 AbstractCegarLoop]: Abstraction has 37757 states and 139692 transitions. [2021-06-05 06:17:40,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37757 states and 139692 transitions. [2021-06-05 06:17:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:40,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:40,287 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:40,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 06:17:40,487 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1071125402, now seen corresponding path program 143 times [2021-06-05 06:17:40,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:40,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615612305] [2021-06-05 06:17:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:17:40,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615612305] [2021-06-05 06:17:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615612305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409240597] [2021-06-05 06:17:40,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:40,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:17:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409240597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:40,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:40,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:40,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242924141] [2021-06-05 06:17:40,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:40,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:40,568 INFO L87 Difference]: Start difference. First operand 37757 states and 139692 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:40,796 INFO L93 Difference]: Finished difference Result 42092 states and 152818 transitions. [2021-06-05 06:17:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:40,889 INFO L225 Difference]: With dead ends: 42092 [2021-06-05 06:17:40,890 INFO L226 Difference]: Without dead ends: 42082 [2021-06-05 06:17:40,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42082 states. [2021-06-05 06:17:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42082 to 37894. [2021-06-05 06:17:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37894 states, 37893 states have (on average 3.698255614493442) internal successors, (140138), 37893 states have internal predecessors, (140138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37894 states to 37894 states and 140138 transitions. [2021-06-05 06:17:41,820 INFO L78 Accepts]: Start accepts. Automaton has 37894 states and 140138 transitions. Word has length 30 [2021-06-05 06:17:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:41,821 INFO L482 AbstractCegarLoop]: Abstraction has 37894 states and 140138 transitions. [2021-06-05 06:17:41,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37894 states and 140138 transitions. [2021-06-05 06:17:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:41,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:41,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:42,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:42,078 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 665328598, now seen corresponding path program 144 times [2021-06-05 06:17:42,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:42,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542014162] [2021-06-05 06:17:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:17:42,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542014162] [2021-06-05 06:17:42,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542014162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848058044] [2021-06-05 06:17:42,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:42,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:17:42,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:17:42,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848058044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 06:17:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548491649] [2021-06-05 06:17:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:17:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:17:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:42,224 INFO L87 Difference]: Start difference. First operand 37894 states and 140138 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-06-05 06:17:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:43,721 INFO L93 Difference]: Finished difference Result 72033 states and 252300 transitions. [2021-06-05 06:17:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:17:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 30 [2021-06-05 06:17:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:43,887 INFO L225 Difference]: With dead ends: 72033 [2021-06-05 06:17:43,888 INFO L226 Difference]: Without dead ends: 71258 [2021-06-05 06:17:43,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=1029, Invalid=3663, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:17:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71258 states. [2021-06-05 06:17:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71258 to 44329. [2021-06-05 06:17:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44329 states, 44328 states have (on average 3.669915177765746) internal successors, (162680), 44328 states have internal predecessors, (162680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44329 states to 44329 states and 162680 transitions. [2021-06-05 06:17:45,088 INFO L78 Accepts]: Start accepts. Automaton has 44329 states and 162680 transitions. Word has length 30 [2021-06-05 06:17:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:45,088 INFO L482 AbstractCegarLoop]: Abstraction has 44329 states and 162680 transitions. [2021-06-05 06:17:45,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-06-05 06:17:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 44329 states and 162680 transitions. [2021-06-05 06:17:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:45,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:45,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:45,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 06:17:45,347 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:45,348 INFO L82 PathProgramCache]: Analyzing trace with hash -536421578, now seen corresponding path program 145 times [2021-06-05 06:17:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:45,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997192139] [2021-06-05 06:17:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:45,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997192139] [2021-06-05 06:17:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997192139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:45,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460484160] [2021-06-05 06:17:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:45,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:45,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460484160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:45,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:45,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:17:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951106142] [2021-06-05 06:17:45,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:17:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:17:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:17:45,430 INFO L87 Difference]: Start difference. First operand 44329 states and 162680 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:46,081 INFO L93 Difference]: Finished difference Result 61744 states and 222077 transitions. [2021-06-05 06:17:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:46,259 INFO L225 Difference]: With dead ends: 61744 [2021-06-05 06:17:46,259 INFO L226 Difference]: Without dead ends: 61646 [2021-06-05 06:17:46,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:17:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-06-05 06:17:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 53362. [2021-06-05 06:17:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53362 states, 53361 states have (on average 3.6997057776278557) internal successors, (197420), 53361 states have internal predecessors, (197420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53362 states to 53362 states and 197420 transitions. [2021-06-05 06:17:47,542 INFO L78 Accepts]: Start accepts. Automaton has 53362 states and 197420 transitions. Word has length 30 [2021-06-05 06:17:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:47,542 INFO L482 AbstractCegarLoop]: Abstraction has 53362 states and 197420 transitions. [2021-06-05 06:17:47,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 53362 states and 197420 transitions. [2021-06-05 06:17:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:47,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:47,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:47,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:47,822 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1862300086, now seen corresponding path program 146 times [2021-06-05 06:17:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:47,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899831990] [2021-06-05 06:17:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:47,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:47,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899831990] [2021-06-05 06:17:47,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899831990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:47,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785810610] [2021-06-05 06:17:47,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:47,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:47,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785810610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:47,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:47,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:17:47,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629172558] [2021-06-05 06:17:47,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:17:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:47,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:17:47,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:17:47,911 INFO L87 Difference]: Start difference. First operand 53362 states and 197420 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:48,270 INFO L93 Difference]: Finished difference Result 63054 states and 226313 transitions. [2021-06-05 06:17:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:48,438 INFO L225 Difference]: With dead ends: 63054 [2021-06-05 06:17:48,438 INFO L226 Difference]: Without dead ends: 63038 [2021-06-05 06:17:48,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:17:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63038 states. [2021-06-05 06:17:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63038 to 53386. [2021-06-05 06:17:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 3.696150604102276) internal successors, (197319), 53385 states have internal predecessors, (197319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 197319 transitions. [2021-06-05 06:17:50,263 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 197319 transitions. Word has length 30 [2021-06-05 06:17:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:50,263 INFO L482 AbstractCegarLoop]: Abstraction has 53386 states and 197319 transitions. [2021-06-05 06:17:50,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 197319 transitions. [2021-06-05 06:17:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:50,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:50,349 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:50,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 06:17:50,550 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:50,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1533523770, now seen corresponding path program 147 times [2021-06-05 06:17:50,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:50,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191759927] [2021-06-05 06:17:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:50,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191759927] [2021-06-05 06:17:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191759927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448257336] [2021-06-05 06:17:50,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:50,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:17:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:50,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448257336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:50,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:50,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:17:50,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625442667] [2021-06-05 06:17:50,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:50,639 INFO L87 Difference]: Start difference. First operand 53386 states and 197319 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:50,984 INFO L93 Difference]: Finished difference Result 61002 states and 219648 transitions. [2021-06-05 06:17:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:17:50,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:51,134 INFO L225 Difference]: With dead ends: 61002 [2021-06-05 06:17:51,134 INFO L226 Difference]: Without dead ends: 60872 [2021-06-05 06:17:51,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:17:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60872 states. [2021-06-05 06:17:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60872 to 54086. [2021-06-05 06:17:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54086 states, 54085 states have (on average 3.6847554774891376) internal successors, (199290), 54085 states have internal predecessors, (199290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54086 states to 54086 states and 199290 transitions. [2021-06-05 06:17:52,356 INFO L78 Accepts]: Start accepts. Automaton has 54086 states and 199290 transitions. Word has length 30 [2021-06-05 06:17:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:52,356 INFO L482 AbstractCegarLoop]: Abstraction has 54086 states and 199290 transitions. [2021-06-05 06:17:52,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 54086 states and 199290 transitions. [2021-06-05 06:17:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:52,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:52,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:52,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 06:17:52,629 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1777851450, now seen corresponding path program 148 times [2021-06-05 06:17:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:52,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794582765] [2021-06-05 06:17:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:52,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794582765] [2021-06-05 06:17:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794582765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569102603] [2021-06-05 06:17:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:52,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:17:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:52,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569102603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:52,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:52,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 06:17:52,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842478072] [2021-06-05 06:17:52,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:52,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:52,721 INFO L87 Difference]: Start difference. First operand 54086 states and 199290 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:53,430 INFO L93 Difference]: Finished difference Result 56541 states and 205849 transitions. [2021-06-05 06:17:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:17:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:53,590 INFO L225 Difference]: With dead ends: 56541 [2021-06-05 06:17:53,590 INFO L226 Difference]: Without dead ends: 56380 [2021-06-05 06:17:53,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:17:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56380 states. [2021-06-05 06:17:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56380 to 51805. [2021-06-05 06:17:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51805 states, 51804 states have (on average 3.7006987877383986) internal successors, (191711), 51804 states have internal predecessors, (191711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51805 states to 51805 states and 191711 transitions. [2021-06-05 06:17:54,943 INFO L78 Accepts]: Start accepts. Automaton has 51805 states and 191711 transitions. Word has length 30 [2021-06-05 06:17:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:54,943 INFO L482 AbstractCegarLoop]: Abstraction has 51805 states and 191711 transitions. [2021-06-05 06:17:54,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51805 states and 191711 transitions. [2021-06-05 06:17:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:55,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:55,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:55,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:55,213 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1134016742, now seen corresponding path program 149 times [2021-06-05 06:17:55,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:55,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133635565] [2021-06-05 06:17:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:55,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:55,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133635565] [2021-06-05 06:17:55,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133635565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:55,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020383156] [2021-06-05 06:17:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:55,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:17:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:55,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020383156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:55,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:55,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:17:55,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739614516] [2021-06-05 06:17:55,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:55,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:55,306 INFO L87 Difference]: Start difference. First operand 51805 states and 191711 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:55,636 INFO L93 Difference]: Finished difference Result 57747 states and 209253 transitions. [2021-06-05 06:17:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:55,776 INFO L225 Difference]: With dead ends: 57747 [2021-06-05 06:17:55,776 INFO L226 Difference]: Without dead ends: 57733 [2021-06-05 06:17:55,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:17:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57733 states. [2021-06-05 06:17:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57733 to 46706. [2021-06-05 06:17:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46706 states, 46705 states have (on average 3.6757092388395245) internal successors, (171674), 46705 states have internal predecessors, (171674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46706 states to 46706 states and 171674 transitions. [2021-06-05 06:17:56,964 INFO L78 Accepts]: Start accepts. Automaton has 46706 states and 171674 transitions. Word has length 30 [2021-06-05 06:17:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:56,964 INFO L482 AbstractCegarLoop]: Abstraction has 46706 states and 171674 transitions. [2021-06-05 06:17:56,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 46706 states and 171674 transitions. [2021-06-05 06:17:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:57,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:57,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 06:17:57,225 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 770710102, now seen corresponding path program 150 times [2021-06-05 06:17:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057722789] [2021-06-05 06:17:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:57,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057722789] [2021-06-05 06:17:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057722789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193327849] [2021-06-05 06:17:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:57,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:17:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:17:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193327849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:57,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:17:57,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038669033] [2021-06-05 06:17:57,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:17:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:17:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:17:57,322 INFO L87 Difference]: Start difference. First operand 46706 states and 171674 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:58,017 INFO L93 Difference]: Finished difference Result 50471 states and 182462 transitions. [2021-06-05 06:17:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:17:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 30 [2021-06-05 06:17:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:58,167 INFO L225 Difference]: With dead ends: 50471 [2021-06-05 06:17:58,167 INFO L226 Difference]: Without dead ends: 50324 [2021-06-05 06:17:58,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:17:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50324 states. [2021-06-05 06:17:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50324 to 46418. [2021-06-05 06:17:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46418 states, 46417 states have (on average 3.6780705345024454) internal successors, (170725), 46417 states have internal predecessors, (170725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46418 states to 46418 states and 170725 transitions. [2021-06-05 06:17:59,325 INFO L78 Accepts]: Start accepts. Automaton has 46418 states and 170725 transitions. Word has length 30 [2021-06-05 06:17:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:59,325 INFO L482 AbstractCegarLoop]: Abstraction has 46418 states and 170725 transitions. [2021-06-05 06:17:59,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 46418 states and 170725 transitions. [2021-06-05 06:17:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:59,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:59,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:59,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 06:17:59,593 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1609551026, now seen corresponding path program 151 times [2021-06-05 06:17:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160162558] [2021-06-05 06:17:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:59,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:59,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160162558] [2021-06-05 06:17:59,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160162558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:59,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623166240] [2021-06-05 06:17:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:17:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:17:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623166240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:59,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:59,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 06:17:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310293212] [2021-06-05 06:17:59,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:17:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:17:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:17:59,694 INFO L87 Difference]: Start difference. First operand 46418 states and 170725 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:00,043 INFO L93 Difference]: Finished difference Result 49897 states and 180569 transitions. [2021-06-05 06:18:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:18:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 30 [2021-06-05 06:18:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:00,170 INFO L225 Difference]: With dead ends: 49897 [2021-06-05 06:18:00,170 INFO L226 Difference]: Without dead ends: 49814 [2021-06-05 06:18:00,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:18:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49814 states. [2021-06-05 06:18:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49814 to 46037. [2021-06-05 06:18:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46037 states, 46036 states have (on average 3.680424015987488) internal successors, (169432), 46036 states have internal predecessors, (169432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46037 states to 46037 states and 169432 transitions. [2021-06-05 06:18:01,220 INFO L78 Accepts]: Start accepts. Automaton has 46037 states and 169432 transitions. Word has length 30 [2021-06-05 06:18:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:01,220 INFO L482 AbstractCegarLoop]: Abstraction has 46037 states and 169432 transitions. [2021-06-05 06:18:01,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 46037 states and 169432 transitions. [2021-06-05 06:18:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:01,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:01,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:01,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:01,481 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash -595123178, now seen corresponding path program 152 times [2021-06-05 06:18:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:01,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046182000] [2021-06-05 06:18:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:01,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:01,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046182000] [2021-06-05 06:18:01,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046182000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:01,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984709003] [2021-06-05 06:18:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:01,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:01,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984709003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:01,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:01,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:18:01,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042816710] [2021-06-05 06:18:01,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:18:01,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:18:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:18:01,575 INFO L87 Difference]: Start difference. First operand 46037 states and 169432 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:01,874 INFO L93 Difference]: Finished difference Result 58034 states and 211506 transitions. [2021-06-05 06:18:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:18:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 30 [2021-06-05 06:18:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:02,020 INFO L225 Difference]: With dead ends: 58034 [2021-06-05 06:18:02,021 INFO L226 Difference]: Without dead ends: 57997 [2021-06-05 06:18:02,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:18:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57997 states. [2021-06-05 06:18:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57997 to 54511. [2021-06-05 06:18:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54511 states, 54510 states have (on average 3.7023298477343607) internal successors, (201814), 54510 states have internal predecessors, (201814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54511 states to 54511 states and 201814 transitions. [2021-06-05 06:18:03,372 INFO L78 Accepts]: Start accepts. Automaton has 54511 states and 201814 transitions. Word has length 30 [2021-06-05 06:18:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:03,372 INFO L482 AbstractCegarLoop]: Abstraction has 54511 states and 201814 transitions. [2021-06-05 06:18:03,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 54511 states and 201814 transitions. [2021-06-05 06:18:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:03,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:03,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 06:18:03,648 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 368942536, now seen corresponding path program 153 times [2021-06-05 06:18:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:03,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406097373] [2021-06-05 06:18:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:03,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:03,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406097373] [2021-06-05 06:18:03,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406097373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:03,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799549269] [2021-06-05 06:18:03,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:03,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:18:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:18:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799549269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:04,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:04,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 06:18:04,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617705503] [2021-06-05 06:18:04,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:18:04,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:04,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:18:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:18:04,176 INFO L87 Difference]: Start difference. First operand 54511 states and 201814 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:05,312 INFO L93 Difference]: Finished difference Result 76071 states and 270587 transitions. [2021-06-05 06:18:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:18:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 30 [2021-06-05 06:18:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:05,518 INFO L225 Difference]: With dead ends: 76071 [2021-06-05 06:18:05,518 INFO L226 Difference]: Without dead ends: 76017 [2021-06-05 06:18:05,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:18:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76017 states. [2021-06-05 06:18:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76017 to 61077. [2021-06-05 06:18:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61077 states, 61076 states have (on average 3.715125417512607) internal successors, (226905), 61076 states have internal predecessors, (226905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61077 states to 61077 states and 226905 transitions. [2021-06-05 06:18:07,086 INFO L78 Accepts]: Start accepts. Automaton has 61077 states and 226905 transitions. Word has length 30 [2021-06-05 06:18:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:07,086 INFO L482 AbstractCegarLoop]: Abstraction has 61077 states and 226905 transitions. [2021-06-05 06:18:07,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 61077 states and 226905 transitions. [2021-06-05 06:18:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:07,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:07,451 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:07,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 06:18:07,651 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash 361087944, now seen corresponding path program 154 times [2021-06-05 06:18:07,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:07,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882553641] [2021-06-05 06:18:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:07,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:07,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882553641] [2021-06-05 06:18:07,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882553641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:07,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654646267] [2021-06-05 06:18:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:07,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654646267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:07,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:07,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:18:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456622551] [2021-06-05 06:18:07,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:18:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:18:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:18:07,741 INFO L87 Difference]: Start difference. First operand 61077 states and 226905 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:08,145 INFO L93 Difference]: Finished difference Result 69205 states and 252584 transitions. [2021-06-05 06:18:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:18:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 30 [2021-06-05 06:18:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:08,328 INFO L225 Difference]: With dead ends: 69205 [2021-06-05 06:18:08,329 INFO L226 Difference]: Without dead ends: 69181 [2021-06-05 06:18:08,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:18:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69181 states. [2021-06-05 06:18:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69181 to 61746. [2021-06-05 06:18:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61746 states, 61745 states have (on average 3.7093691796906634) internal successors, (229035), 61745 states have internal predecessors, (229035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61746 states to 61746 states and 229035 transitions. [2021-06-05 06:18:09,757 INFO L78 Accepts]: Start accepts. Automaton has 61746 states and 229035 transitions. Word has length 30 [2021-06-05 06:18:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:09,757 INFO L482 AbstractCegarLoop]: Abstraction has 61746 states and 229035 transitions. [2021-06-05 06:18:09,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 61746 states and 229035 transitions. [2021-06-05 06:18:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:09,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:09,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:10,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 06:18:10,051 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1851937992, now seen corresponding path program 155 times [2021-06-05 06:18:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:10,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572281541] [2021-06-05 06:18:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:10,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:10,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572281541] [2021-06-05 06:18:10,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572281541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:10,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668031266] [2021-06-05 06:18:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:10,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:18:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:10,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668031266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:10,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:10,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 06:18:10,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895948943] [2021-06-05 06:18:10,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:18:10,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:18:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:18:10,147 INFO L87 Difference]: Start difference. First operand 61746 states and 229035 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:10,853 INFO L93 Difference]: Finished difference Result 68985 states and 251648 transitions. [2021-06-05 06:18:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:18:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 30 [2021-06-05 06:18:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:11,021 INFO L225 Difference]: With dead ends: 68985 [2021-06-05 06:18:11,021 INFO L226 Difference]: Without dead ends: 68907 [2021-06-05 06:18:11,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:18:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68907 states. [2021-06-05 06:18:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68907 to 61549. [2021-06-05 06:18:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61549 states, 61548 states have (on average 3.703434717618769) internal successors, (227939), 61548 states have internal predecessors, (227939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61549 states to 61549 states and 227939 transitions. [2021-06-05 06:18:12,404 INFO L78 Accepts]: Start accepts. Automaton has 61549 states and 227939 transitions. Word has length 30 [2021-06-05 06:18:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:12,404 INFO L482 AbstractCegarLoop]: Abstraction has 61549 states and 227939 transitions. [2021-06-05 06:18:12,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 61549 states and 227939 transitions. [2021-06-05 06:18:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:12,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:12,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:12,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 06:18:12,704 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 239147384, now seen corresponding path program 156 times [2021-06-05 06:18:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:12,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782202273] [2021-06-05 06:18:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:12,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782202273] [2021-06-05 06:18:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782202273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420414297] [2021-06-05 06:18:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:12,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:18:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:18:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:18:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420414297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:12,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:12,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:18:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136357122] [2021-06-05 06:18:12,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:18:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:18:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:18:12,816 INFO L87 Difference]: Start difference. First operand 61549 states and 227939 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:13,240 INFO L93 Difference]: Finished difference Result 87148 states and 316679 transitions. [2021-06-05 06:18:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:18:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 32 [2021-06-05 06:18:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:14,027 INFO L225 Difference]: With dead ends: 87148 [2021-06-05 06:18:14,027 INFO L226 Difference]: Without dead ends: 87117 [2021-06-05 06:18:14,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:18:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87117 states. [2021-06-05 06:18:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87117 to 74655. [2021-06-05 06:18:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74655 states, 74654 states have (on average 3.7167064055509416) internal successors, (277467), 74654 states have internal predecessors, (277467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74655 states to 74655 states and 277467 transitions. [2021-06-05 06:18:15,619 INFO L78 Accepts]: Start accepts. Automaton has 74655 states and 277467 transitions. Word has length 32 [2021-06-05 06:18:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:15,619 INFO L482 AbstractCegarLoop]: Abstraction has 74655 states and 277467 transitions. [2021-06-05 06:18:15,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 74655 states and 277467 transitions. [2021-06-05 06:18:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:15,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:15,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:15,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 06:18:15,942 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:15,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1789990140, now seen corresponding path program 157 times [2021-06-05 06:18:15,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:15,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859916622] [2021-06-05 06:18:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:15,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859916622] [2021-06-05 06:18:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859916622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450526311] [2021-06-05 06:18:15,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:15,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:16,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450526311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:16,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:16,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 06:18:16,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530741583] [2021-06-05 06:18:16,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:18:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:18:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:18:16,047 INFO L87 Difference]: Start difference. First operand 74655 states and 277467 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) [2021-06-05 06:18:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:17,745 INFO L93 Difference]: Finished difference Result 126973 states and 451879 transitions. [2021-06-05 06:18:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:18:17,746 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 32 [2021-06-05 06:18:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:18,106 INFO L225 Difference]: With dead ends: 126973 [2021-06-05 06:18:18,106 INFO L226 Difference]: Without dead ends: 126092 [2021-06-05 06:18:18,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=660, Invalid=2310, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:18:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126092 states. [2021-06-05 06:18:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126092 to 81796. [2021-06-05 06:18:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81796 states, 81795 states have (on average 3.726902622409683) internal successors, (304842), 81795 states have internal predecessors, (304842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81796 states to 81796 states and 304842 transitions. [2021-06-05 06:18:20,770 INFO L78 Accepts]: Start accepts. Automaton has 81796 states and 304842 transitions. Word has length 32 [2021-06-05 06:18:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:20,770 INFO L482 AbstractCegarLoop]: Abstraction has 81796 states and 304842 transitions. [2021-06-05 06:18:20,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-06-05 06:18:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 81796 states and 304842 transitions. [2021-06-05 06:18:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:20,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:20,903 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:21,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:21,104 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2130967828, now seen corresponding path program 158 times [2021-06-05 06:18:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:21,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130331583] [2021-06-05 06:18:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:21,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130331583] [2021-06-05 06:18:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130331583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512265553] [2021-06-05 06:18:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:21,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:18:21,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512265553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:21,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:21,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 06:18:21,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005901570] [2021-06-05 06:18:21,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:18:21,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:18:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:18:21,215 INFO L87 Difference]: Start difference. First operand 81796 states and 304842 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) [2021-06-05 06:18:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:23,204 INFO L93 Difference]: Finished difference Result 103823 states and 367181 transitions. [2021-06-05 06:18:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:18:23,205 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 32 [2021-06-05 06:18:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:23,486 INFO L225 Difference]: With dead ends: 103823 [2021-06-05 06:18:23,486 INFO L226 Difference]: Without dead ends: 102463 [2021-06-05 06:18:23,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1018.9ms TimeCoverageRelationStatistics Valid=1264, Invalid=4898, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:18:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102463 states. [2021-06-05 06:18:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102463 to 81213. [2021-06-05 06:18:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81213 states, 81212 states have (on average 3.721420479732059) internal successors, (302224), 81212 states have internal predecessors, (302224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81213 states to 81213 states and 302224 transitions. [2021-06-05 06:18:25,894 INFO L78 Accepts]: Start accepts. Automaton has 81213 states and 302224 transitions. Word has length 32 [2021-06-05 06:18:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:25,894 INFO L482 AbstractCegarLoop]: Abstraction has 81213 states and 302224 transitions. [2021-06-05 06:18:25,894 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) [2021-06-05 06:18:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81213 states and 302224 transitions. [2021-06-05 06:18:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:26,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:26,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:26,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:26,228 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -81096240, now seen corresponding path program 159 times [2021-06-05 06:18:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:26,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288046179] [2021-06-05 06:18:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:26,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:26,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288046179] [2021-06-05 06:18:26,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288046179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:26,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839580781] [2021-06-05 06:18:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:26,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:18:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:26,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:26,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839580781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:26,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:26,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:18:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806572194] [2021-06-05 06:18:26,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:18:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:18:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:18:26,316 INFO L87 Difference]: Start difference. First operand 81213 states and 302224 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:26,767 INFO L93 Difference]: Finished difference Result 89727 states and 327410 transitions. [2021-06-05 06:18:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:18:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:18:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:27,539 INFO L225 Difference]: With dead ends: 89727 [2021-06-05 06:18:27,540 INFO L226 Difference]: Without dead ends: 89463 [2021-06-05 06:18:27,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:18:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89463 states. [2021-06-05 06:18:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89463 to 81093. [2021-06-05 06:18:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81093 states, 81092 states have (on average 3.7186035613870665) internal successors, (301549), 81092 states have internal predecessors, (301549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81093 states to 81093 states and 301549 transitions. [2021-06-05 06:18:29,219 INFO L78 Accepts]: Start accepts. Automaton has 81093 states and 301549 transitions. Word has length 32 [2021-06-05 06:18:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:29,220 INFO L482 AbstractCegarLoop]: Abstraction has 81093 states and 301549 transitions. [2021-06-05 06:18:29,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 81093 states and 301549 transitions. [2021-06-05 06:18:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:29,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:29,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:29,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:29,557 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1144501508, now seen corresponding path program 160 times [2021-06-05 06:18:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:29,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500876994] [2021-06-05 06:18:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:29,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:29,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500876994] [2021-06-05 06:18:29,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500876994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:29,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670543618] [2021-06-05 06:18:29,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:29,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 06:18:29,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670543618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:29,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:29,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 06:18:29,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022121475] [2021-06-05 06:18:29,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:18:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:18:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:18:29,647 INFO L87 Difference]: Start difference. First operand 81093 states and 301549 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:30,659 INFO L93 Difference]: Finished difference Result 95050 states and 344724 transitions. [2021-06-05 06:18:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:18:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 32 [2021-06-05 06:18:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:30,971 INFO L225 Difference]: With dead ends: 95050 [2021-06-05 06:18:30,971 INFO L226 Difference]: Without dead ends: 94988 [2021-06-05 06:18:30,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:18:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94988 states. [2021-06-05 06:18:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94988 to 80568. [2021-06-05 06:18:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80568 states, 80567 states have (on average 3.7057604230019736) internal successors, (298562), 80567 states have internal predecessors, (298562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80568 states to 80568 states and 298562 transitions. [2021-06-05 06:18:32,906 INFO L78 Accepts]: Start accepts. Automaton has 80568 states and 298562 transitions. Word has length 32 [2021-06-05 06:18:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:32,906 INFO L482 AbstractCegarLoop]: Abstraction has 80568 states and 298562 transitions. [2021-06-05 06:18:32,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 80568 states and 298562 transitions. [2021-06-05 06:18:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:33,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:33,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:33,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:33,234 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1462193428, now seen corresponding path program 161 times [2021-06-05 06:18:33,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:33,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135739558] [2021-06-05 06:18:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:33,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:33,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135739558] [2021-06-05 06:18:33,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135739558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:33,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972461825] [2021-06-05 06:18:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:33,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:18:33,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 06:18:33,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972461825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:33,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:33,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 06:18:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905735912] [2021-06-05 06:18:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:18:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:18:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:18:33,361 INFO L87 Difference]: Start difference. First operand 80568 states and 298562 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) [2021-06-05 06:18:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:34,941 INFO L93 Difference]: Finished difference Result 137312 states and 490128 transitions. [2021-06-05 06:18:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:18:34,942 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 32 [2021-06-05 06:18:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:35,318 INFO L225 Difference]: With dead ends: 137312 [2021-06-05 06:18:35,318 INFO L226 Difference]: Without dead ends: 137132 [2021-06-05 06:18:35,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:18:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137132 states. [2021-06-05 06:18:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137132 to 97897. [2021-06-05 06:18:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97897 states, 97896 states have (on average 3.721204135000409) internal successors, (364291), 97896 states have internal predecessors, (364291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97897 states to 97897 states and 364291 transitions. [2021-06-05 06:18:38,170 INFO L78 Accepts]: Start accepts. Automaton has 97897 states and 364291 transitions. Word has length 32 [2021-06-05 06:18:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:38,170 INFO L482 AbstractCegarLoop]: Abstraction has 97897 states and 364291 transitions. [2021-06-05 06:18:38,170 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) [2021-06-05 06:18:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 97897 states and 364291 transitions. [2021-06-05 06:18:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:38,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:38,341 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:38,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 06:18:38,542 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1396100842, now seen corresponding path program 162 times [2021-06-05 06:18:38,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:38,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083025281] [2021-06-05 06:18:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:38,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:38,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083025281] [2021-06-05 06:18:38,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083025281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:38,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441430855] [2021-06-05 06:18:38,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:38,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:18:38,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:18:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:38,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441430855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:38,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:38,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 06:18:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814030479] [2021-06-05 06:18:38,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:18:38,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:18:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:18:38,663 INFO L87 Difference]: Start difference. First operand 97897 states and 364291 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-06-05 06:18:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:40,480 INFO L93 Difference]: Finished difference Result 144885 states and 519929 transitions. [2021-06-05 06:18:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:18:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 32 [2021-06-05 06:18:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:40,862 INFO L225 Difference]: With dead ends: 144885 [2021-06-05 06:18:40,862 INFO L226 Difference]: Without dead ends: 144573 [2021-06-05 06:18:40,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=688, Invalid=2392, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:18:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144573 states. [2021-06-05 06:18:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144573 to 114379. [2021-06-05 06:18:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114379 states, 114378 states have (on average 3.7425029288849254) internal successors, (428060), 114378 states have internal predecessors, (428060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114379 states to 114379 states and 428060 transitions. [2021-06-05 06:18:44,480 INFO L78 Accepts]: Start accepts. Automaton has 114379 states and 428060 transitions. Word has length 32 [2021-06-05 06:18:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:44,480 INFO L482 AbstractCegarLoop]: Abstraction has 114379 states and 428060 transitions. [2021-06-05 06:18:44,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-06-05 06:18:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 114379 states and 428060 transitions. [2021-06-05 06:18:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:44,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:44,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:44,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 06:18:44,874 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2064838904, now seen corresponding path program 163 times [2021-06-05 06:18:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:44,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425295399] [2021-06-05 06:18:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:44,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425295399] [2021-06-05 06:18:44,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425295399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830247093] [2021-06-05 06:18:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:44,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:18:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830247093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:45,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:45,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 06:18:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987799815] [2021-06-05 06:18:45,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:18:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:18:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:18:45,000 INFO L87 Difference]: Start difference. First operand 114379 states and 428060 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-06-05 06:18:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:47,210 INFO L93 Difference]: Finished difference Result 145887 states and 519027 transitions. [2021-06-05 06:18:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:18:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 32 [2021-06-05 06:18:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:47,615 INFO L225 Difference]: With dead ends: 145887 [2021-06-05 06:18:47,615 INFO L226 Difference]: Without dead ends: 144953 [2021-06-05 06:18:47,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:18:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144953 states. [2021-06-05 06:18:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144953 to 114129. [2021-06-05 06:18:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114129 states, 114128 states have (on average 3.7392051030421984) internal successors, (426748), 114128 states have internal predecessors, (426748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114129 states to 114129 states and 426748 transitions. [2021-06-05 06:18:51,196 INFO L78 Accepts]: Start accepts. Automaton has 114129 states and 426748 transitions. Word has length 32 [2021-06-05 06:18:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:51,196 INFO L482 AbstractCegarLoop]: Abstraction has 114129 states and 426748 transitions. [2021-06-05 06:18:51,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-06-05 06:18:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 114129 states and 426748 transitions. [2021-06-05 06:18:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:18:51,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:51,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:51,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:51,628 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1651144382, now seen corresponding path program 164 times [2021-06-05 06:18:51,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:51,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715392508] [2021-06-05 06:18:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:18:51,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715392508] [2021-06-05 06:18:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715392508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166571022] [2021-06-05 06:18:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:51,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:18:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166571022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:18:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071046135] [2021-06-05 06:18:51,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:18:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:18:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:18:51,760 INFO L87 Difference]: Start difference. First operand 114129 states and 426748 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:52,841 INFO L93 Difference]: Finished difference Result 131239 states and 477233 transitions. [2021-06-05 06:18:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:18:52,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:18:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:53,880 INFO L225 Difference]: With dead ends: 131239 [2021-06-05 06:18:53,881 INFO L226 Difference]: Without dead ends: 130909 [2021-06-05 06:18:53,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:18:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130909 states. [2021-06-05 06:18:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130909 to 114599. [2021-06-05 06:18:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114599 states, 114598 states have (on average 3.7350041012932165) internal successors, (428024), 114598 states have internal predecessors, (428024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114599 states to 114599 states and 428024 transitions. [2021-06-05 06:18:56,806 INFO L78 Accepts]: Start accepts. Automaton has 114599 states and 428024 transitions. Word has length 32 [2021-06-05 06:18:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 114599 states and 428024 transitions. [2021-06-05 06:18:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 114599 states and 428024 transitions. [2021-06-05 06:18:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:18:57,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:57,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:57,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 06:18:57,216 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1784629138, now seen corresponding path program 165 times [2021-06-05 06:18:57,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:57,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608826826] [2021-06-05 06:18:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:57,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:57,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608826826] [2021-06-05 06:18:57,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608826826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:57,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624595674] [2021-06-05 06:18:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:18:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:57,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 06:18:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:58,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 06:18:58,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:58,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:58,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:18:58,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:90 [2021-06-05 06:18:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 06:18:58,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:58,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:58,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:18:58,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:93 [2021-06-05 06:18:58,357 INFO L446 ElimStorePlain]: Different costs {0=[v_C_222], 5=[B], 9=[A]} [2021-06-05 06:18:58,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:18:58,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:58,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:58,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-06-05 06:18:58,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:58,964 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-06-05 06:18:58,965 INFO L628 ElimStorePlain]: treesize reduction 240, result has 35.7 percent of original size [2021-06-05 06:18:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:58,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:58,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 103 treesize of output 113